Best Heated Socks of 2026: Top 10 Battery-Heated Socks for Skiing, Hunting and Everyday Cold

Ten currently sold battery-heated socks compared on published heating tech, runtime, controls and price, from toe-cap ski socks to app-controlled everyday picks.

Last updated 11 min readCompiled from official sources — not tested by Guidevio

How this guide was built: Guidevio compiled it from manufacturers' official product pages and specifications. We did not buy, borrow or test any of these heated socks, and nothing here is a lab result, a review score, or a sponsored placement. Prices are shown only where we saw them on an official brand page and can change at any time. All links in this guide go straight to the brand's official page and earn nothing today. Commissions never decide which products are included or how they're ranked.

Feet in warm wool socks by a cabin window beside ski boots
Illustrative photography commissioned for Guidevio. It shows the category in context and is not a photo of any recommended product.

This guide rounds up ten battery-heated socks that were confirmed for sale on manufacturer sites at the time of research, spanning dedicated ski socks with toe-focused heating elements, whole-footpad hunting and work socks, and app-controlled everyday options. Every sock here is a real, named product with a working product page; nothing has been invented, and prices, specs and features are quoted only where a brand publishes them. Where a price wasn't published, this guide says so rather than guessing.

Heated socks vary a lot in how and where they heat: some use a thin heating line built into the knit near the toes, others heat the full sole, and some add Bluetooth app control on top of a physical controller. This guide reports only what each brand states about its own sock on its own product page — it does not run independent battery-life or warmth tests, or compare one brand's heating claims against another's beyond what's published.

None of these socks has been tested by Guidevio. This is desk research built from manufacturer product pages. Considerations, pros and cons reflect what brands themselves publish, plus general category knowledge about tradeoffs like toe-only versus full-footpad heating or app control versus a simple button — not a scored or awarded verdict from Guidevio.

Who this guide is for

  • Skiers and snowboarders who want a dedicated ski-specific heated sock built to fit inside ski boots
  • Hunters and outdoor workers who want long battery runtime or whole-sole heating for standing still in the cold
  • Anyone who wants app-controlled or remote-controlled heat settings for finer adjustment
  • Value-conscious buyers comparing published battery life, heating zones and price before buying
  • Motorcyclists and commuters who want a heated sock that isn't tied specifically to ski boots

How we chose

  • Only heated socks with a live, working page on a manufacturer's site at the time of research were included
  • Every URL cited in the underlying research was checked rather than assumed from a search snippet
  • Prices, battery specs and heating-zone descriptions are quoted only where a brand states them
  • The list spans premium ski-specific socks and more affordable general-purpose heated socks rather than ranking purely by price
  • No sock in this guide has been tested or worn by Guidevio; descriptions are drawn from published product information
  • No more than two or three picks per brand were included to keep the list diverse; some reviewed products were excluded for lacking clear, verifiable specs and pricing on a dedicated brand storefront

Top 10 at a glance

Specifications as published by the manufacturer or the listing we consulted. Scroll sideways on a small screen.

Comparison of the ten picks in Best Heated Socks of 2026: Top 10 Battery-Heated Socks for Skiing, Hunting and Everyday Cold
PickBest forHeating zoneBattery lifePriceOfficial site
1. Heat Sock 5.1 Toe CapSkiers and snowboarders who want a dual-sided toe heating element for full-day mountain useTop and bottom of toesUp to 23 hours$175.00Visit
2. Ultra Warm Performance S.E.T®Performance-focused skiers who want a slim, low-bulk heating line for tight bootsThin heating line throughout knitNot published by Therm-ic$159.95Visit
3. 7V Ultimate Wool Heated SocksMotorcyclists, hunters, and outdoor workers who want whole-sole heating rather than toe-only warmthFull footpadNot published by Gerbing$189.99Visit
4. Merino 2.0 Heated Socks (Mobile Warming® Technology)All-day hunters and outdoor workers who need long runtime from a single charge at a mid-range priceUnder the toesUp to 16 hours$99.99Visit
5. Pro Merino Heated Socks Unisex (Mobile Warming® Technology)Cold-weather workers and hikers who want dual-zone heat and phone-based control for finer temperature adjustmentOver and under the footUp to 13 hours$129.99Visit
6. 5V Wool Battery Heated SocksHunters and campers who want ActionHeat's highest-voltage sock line for maximum output in deep coldNot specified by ActionHeatNot published by ActionHeat$159.99Visit
7. LYSS01G App-Controlled Heated SocksTech-minded users who want smartphone app control over heat settings for commuting or everyday cold-weather wearToe area, instep, forefootUp to 8 hours$109.99Visit
8. Heat Sock Set XLP 2S BT Surround Comfort EVOSerious backcountry and alpine skiers who prioritize maximum battery capacity and a heating element that wraps fully around the toesSurround Heating Element (toes)Up to 18 hoursSee current price at HotronicVisit
9. Heated Socks with App ControlBudget-conscious hunters and hikers who want app-controlled heat settings without paying premium-brand pricesToe/instep areaNot published by Snow Deer$109.99Visit
10. Powersocks Heat Fusion UniRecreational skiers who want an affordable, no-frills heated sock built specifically for ski bootsNot specified by Therm-icNot published by Therm-ic$139.95Visit

The ten picks in detail

1Best overallLenz

Heat Sock 5.1 Toe Cap

Lenz

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Heat Sock 5.1 Toe Cap

Patented Toe Cap® element heating both the top and bottom of the toes

Lenz's flagship heated ski sock, built with a patented Toe Cap® heating element that heats both the top and bottom of the toes, in a knee-high merino-silk blend designed for full-day mountain use.

Why it is on this list: It's Lenz's flagship ski sock with a dual-sided toe heating element and up to 23 hours of published runtime, aimed squarely at full-day mountain use.

Key features

  • Toe Cap® heating element (top and bottom of toes)
  • Up to 23 hours of heat depending on battery pack
  • Compatible with Lenz Body Heat System rechargeable battery packs (sold separately)
  • Knee-high merino-silk blend
  • Heating zone: Top and bottom of toes (Toe Cap®)
  • Battery life: Up to 23 hours, depending on battery pack
  • Material: Merino-silk blend, knee-high
  • Battery: Lenz Body Heat System (sold separately)
Pros
  • Toe Cap® heating element heats top and bottom of toes, as described by Lenz
  • Up to 23 hours of heat depending on battery pack, per Lenz
  • Knee-high merino-silk blend construction aimed at full-day ski use
Cons
  • At $175.00, it's the most expensive sock on this list
  • Battery packs are sold separately
  • Lenz doesn't publish a specific number of heat settings

Before you buy: Battery packs are sold separately and add to the total cost. Lenz doesn't publish an exact number of heat settings.

$175.00 — seen on us.store.lenzproducts.ca · Best for Skiers and snowboarders who want a dual-sided toe heating element for full-day mountain useCheck price at Lenz
2Best for tight-fitting bootsTherm-ic

Ultra Warm Performance S.E.T®

Therm-ic

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Ultra Warm Performance S.E.T®

Thin S.E.T® heating line integrated into the knit for minimal bulk in performance boots

Therm-ic's performance heated sock built with Smart.Elastic.Technology (S.E.T®), a thin heating line integrated directly into the knit for low bulk inside tight race or performance ski boots.

Why it is on this list: It's Therm-ic's performance-oriented heated sock built specifically to avoid the bulk that can come with thicker heating elements in race or performance boots.

Key features

  • Smart.Elastic.Technology (S.E.T®) thin heating line
  • Merino-blend, thermo-regulating and moisture-wicking
  • Compatible with Therm-ic S-Pack rechargeable battery packs (sold separately)
  • Heating zone: Thin S.E.T® heating line throughout knit
  • Battery life: Not published by Therm-ic
  • Material: Merino blend
  • Battery: Therm-ic S-Pack (sold separately)
Pros
  • Slim S.E.T® heating line built into the knit, as described by Therm-ic
  • Merino-blend, thermo-regulating and moisture-wicking construction
  • Designed to fit inside tight race or performance boots
Cons
  • Battery packs are sold separately
  • Therm-ic doesn't publish an exact battery-life figure for this model
  • No confirmed current-model Amazon listing was found

Before you buy: Battery packs are sold separately. Therm-ic doesn't publish an exact battery-life figure for this specific model.

$159.95 — seen on therm-ic.us · Best for Performance-focused skiers who want a slim, low-bulk heating line for tight bootsCheck price at Therm-ic
3Best full-footpad heatingGerbing

7V Ultimate Wool Heated Socks

Gerbing

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7V Ultimate Wool Heated Socks

Full footpad microwire heating across the entire bottom of the foot

Gerbing's heated sock built with a full footpad microwire heating system covering the entire bottom of the foot, paired with touch-button control and included slim rechargeable batteries.

Why it is on this list: It's one of the few socks on this list to heat the entire bottom of the foot rather than just the toes, with batteries included in the price.

Key features

  • Full footpad microwire heating system
  • Touch-button temperature control
  • Slim 2200mAh rechargeable batteries included
  • Wool-blend, moisture-wicking fabric
  • Heating zone: Full footpad (entire bottom of foot)
  • Battery life: Not published in hours by Gerbing
  • Material: Wool-blend, moisture-wicking
  • Battery: 2200mAh rechargeable, included
Pros
  • Full footpad (entire bottom of foot) heating, as described by Gerbing
  • Touch-button temperature control
  • Slim 2200mAh rechargeable batteries included in the price
Cons
  • At $189.99, it's among the pricier picks on this list
  • Gerbing doesn't publish an exact battery-life figure in hours
  • No confirmed current-model Amazon listing was found

Before you buy: Gerbing doesn't publish an exact battery-life figure in hours for this model.

$189.99 — seen on gerbing.com · Best for Motorcyclists, hunters, and outdoor workers who want whole-sole heating rather than toe-only warmthCheck price at Gerbing
4Best battery runtimeFieldsheer

Merino 2.0 Heated Socks (Mobile Warming® Technology)

Fieldsheer

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Merino 2.0 Heated Socks (Mobile Warming® Technology)

Up to 16 hours of heat per charge with an included wireless remote-controlled battery

Fieldsheer's toe-heating sock built with Mobile Warming® technology, including a Powersheer® Pro Wireless 4000mAh battery with wireless remote control and up to 16 hours of runtime per charge.

Why it is on this list: It pairs the longest published per-charge runtime among the toe-heating socks on this list with an included battery and remote, at a mid-range price.

Key features

  • Heat under the toes
  • Up to 16 hours of heat per charge
  • Includes Powersheer® Pro Wireless 4000mAh lithium-ion battery with wireless remote
  • Merino wool blend, over-the-calf length
  • Heating zone: Under the toes
  • Battery life: Up to 16 hours per charge
  • Material: Merino wool blend, over-the-calf
  • Battery: Powersheer® Pro Wireless 4000mAh, included
Pros
  • Up to 16 hours of heat per charge, as described by Fieldsheer
  • Includes a Powersheer® Pro Wireless 4000mAh battery with wireless remote
  • Merino wool blend, over-the-calf length
Cons
  • Heats only under the toes rather than the full foot
  • No confirmed current-model Amazon listing was found
  • Fieldsheer doesn't publish the number of discrete heat settings

Before you buy: Heats only under the toes rather than the full foot. Fieldsheer doesn't publish the number of discrete heat settings.

$99.99 — seen on fieldsheer.com · Best for All-day hunters and outdoor workers who need long runtime from a single charge at a mid-range priceCheck price at Fieldsheer
5Best app control for dual-zone heatFieldsheer

Pro Merino Heated Socks Unisex (Mobile Warming® Technology)

Fieldsheer

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Pro Merino Heated Socks Unisex (Mobile Warming® Technology)

Dual heat zone covering both over and under the foot, with app-based Bluetooth control

Fieldsheer's dual heat zone sock, heating both over and under the foot, controlled via Bluetooth through the brand's MW Connect™ app and lasting up to 13 hours per charge.

Why it is on this list: It's Fieldsheer's step-up model over the Merino 2.0, adding a second heat zone and app control for shoppers who want finer, phone-based adjustment.

Key features

  • Dual heat zone (over and under the foot)
  • Lasts up to 13 hours per charge
  • Bluetooth-enabled wireless control via MW Connect™ app
  • Merino wool blend, machine washable
  • Heating zone: Over and under the foot (dual zone)
  • Battery life: Up to 13 hours per charge
  • Material: Merino wool blend, machine washable
  • Battery: Not specified beyond Mobile Warming® system
Pros
  • Dual heat zone (over and under the foot), as described by Fieldsheer
  • Bluetooth-enabled wireless control via the MW Connect™ app
  • Merino wool blend and machine washable
Cons
  • Shorter published runtime (up to 13 hours) than the Fieldsheer Merino 2.0
  • No confirmed current-model Amazon listing was found
  • Requires a smartphone and the MW Connect™ app for full control

Before you buy: Runtime (up to 13 hours) is shorter than Fieldsheer's own Merino 2.0. Full control requires pairing with the MW Connect™ smartphone app.

$129.99 — seen on fieldsheer.com · Best for Cold-weather workers and hikers who want dual-zone heat and phone-based control for finer temperature adjustmentCheck price at Fieldsheer
6Best for maximum heat outputActionHeat

5V Wool Battery Heated Socks

ActionHeat

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5V Wool Battery Heated Socks

5V heating capable of reaching up to 150°F, ActionHeat's highest-output sock line

ActionHeat's highest-voltage heated sock line, capable of heating up to 150°F with three heat-level settings via touch-button control, in a rechargeable wool-blend construction.

Why it is on this list: Its published 150°F maximum heat output is the highest stated temperature figure among the socks in this guide, aimed at buyers prioritizing raw heat output.

Key features

  • Heats up to 150°F
  • 3 heat level settings with touch-button control
  • Rechargeable battery
  • Wool-blend construction
  • Heating zone: Not specified beyond general sock heating
  • Battery life: Not published by ActionHeat
  • Material: Wool-blend
  • Max heat: Up to 150°F
Pros
  • Heats up to 150°F, as described by ActionHeat
  • 3 heat level settings with simple touch-button control
  • Rechargeable battery, wool-blend construction
Cons
  • ActionHeat doesn't publish a battery-life figure in hours
  • No app or remote control; touch-button only
  • No confirmed current-model Amazon listing was found

Before you buy: ActionHeat doesn't publish a battery-life figure in hours. Control is via touch-button only, with no app or remote.

$159.99 — seen on actionheat.com · Best for Hunters and campers who want ActionHeat's highest-voltage sock line for maximum output in deep coldCheck price at ActionHeat
7Best for everyday app controlSavior Heat

LYSS01G App-Controlled Heated Socks

Savior Heat

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LYSS01G App-Controlled Heated Socks

Far-infrared heating across the toe area, instep and forefoot with Bluetooth app control

Savior Heat's far-infrared heated sock covering the toe area, instep and forefoot, controlled via a Bluetooth app with three heat settings and a UL/CE-certified 7.4V battery.

Why it is on this list: It's an app-controlled everyday heated sock with a UL/CE-certified battery, covering a wider heating area than toe-only socks at a moderate price.

Key features

  • Far-infrared heating elements: toe area, instep, and forefoot
  • 3 heat settings (high/medium/low)
  • Up to 8 hours of battery life
  • 7.4V UL/CE-certified battery with Bluetooth app control
  • COOLMAX® fabric
  • Heating zone: Toe area, instep, forefoot
  • Battery life: Up to 8 hours
  • Material: COOLMAX® fabric
  • Battery: 7.4V, UL/CE-certified
Pros
  • Far-infrared heating elements covering toe area, instep, and forefoot, as described by Savior Heat
  • 3 heat settings (high/medium/low) with Bluetooth app control
  • 7.4V UL/CE-certified battery
Cons
  • Up to 8 hours of battery life is shorter than several other picks on this list
  • No confirmed current-model Amazon listing was found
  • Requires a smartphone app for full control

Before you buy: Up to 8 hours of battery life is shorter than several other picks on this list. Full control requires a smartphone app.

$109.99 — seen on saviorheat.com · Best for Tech-minded users who want smartphone app control over heat settings for commuting or everyday cold-weather wearCheck price at Savior Heat
8Best battery capacityHotronic (BootDoc-Hotronic)

Heat Sock Set XLP 2S BT Surround Comfort EVO

Hotronic (BootDoc-Hotronic)

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Heat Sock Set XLP 2S BT Surround Comfort EVO

A 4400mAh battery rated for up to 18 hours of heat plus a fully surrounding toe heating element

Hotronic's premium heated sock set, paired with a 4400mAh battery pack rated for up to 18 hours of constant heating power, Bluetooth app control, and a Surround Heating Element that envelops the toes.

Why it is on this list: It has the highest published battery capacity and runtime figure of any sock in this guide, with a heating element built to wrap fully around the toes.

Key features

  • 4400mAh battery pack, up to 18 hours of constant heating power
  • Bluetooth app control of the battery pack
  • Surround Heating Element envelops the toes
  • Merino wool-blend sock material
  • Heating zone: Surround Heating Element (envelops the toes)
  • Battery life: Up to 18 hours of constant heating power
  • Material: Merino wool-blend
  • Battery: 4400mAh, Bluetooth app control
Pros
  • 4400mAh battery pack rated for up to 18 hours of constant heating power, as described by Hotronic
  • Bluetooth app control of the battery pack
  • Surround Heating Element envelops the toes rather than heating from one side only
Cons
  • Price is not published on the U.S. brand site; sold through authorized dealers
  • No confirmed current-model Amazon listing was found
  • Buyers must contact a dealer to confirm current pricing

Before you buy: Price is not published on the U.S. brand site and is sold through authorized dealers; confirm current pricing before buying.

See current price at Hotronic · Best for Serious backcountry and alpine skiers who prioritize maximum battery capacity and a heating element that wraps fully around the toesCheck price at Hotronic
9Budget pickSnow Deer

Heated Socks with App Control

Snow Deer

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Heated Socks with App Control

App-controlled far-infrared heating at the toe/instep at a budget-friendly price

Snow Deer's app-controlled heated sock, using far-infrared heating elements at the toe and instep area with Bluetooth app control of heating levels, at a budget-friendly price.

Why it is on this list: It's the lowest-priced app-controlled sock in this guide, giving budget-conscious buyers Bluetooth control without a premium-brand price tag.

Key features

  • Bluetooth app control of heating levels
  • Rechargeable lithium-ion battery
  • Far-infrared heating elements at toe/instep area
  • Heating zone: Toe/instep area (far-infrared)
  • Battery life: Not published by Snow Deer
  • Material: Not published by Snow Deer
  • Battery: Rechargeable lithium-ion, Bluetooth app control
Pros
  • Bluetooth app control of heating levels, as described by Snow Deer
  • Rechargeable lithium-ion battery
  • Lower price than most app-controlled competitors on this list
Cons
  • Snow Deer doesn't publish a battery-life figure in hours
  • No confirmed current-model Amazon listing was found
  • Snow Deer doesn't publish the number of discrete heat settings

Before you buy: Snow Deer doesn't publish a battery-life figure in hours or the number of discrete heat settings.

$109.99 — seen on snowdeerheat.com · Best for Budget-conscious hunters and hikers who want app-controlled heat settings without paying premium-brand pricesCheck price at Snow Deer
10Budget pick for ski bootsTherm-ic

Powersocks Heat Fusion Uni

Therm-ic

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Powersocks Heat Fusion Uni

An affordable, ski-boot-specific heated sock with adjustable heat settings

Therm-ic's unisex, ski-boot-specific heated sock with multiple adjustable heat settings via a battery-pack controller, positioned as an affordable, no-frills option for recreational skiers.

Why it is on this list: It's Therm-ic's entry-level ski-specific heated sock, giving recreational skiers a lower-cost option than the brand's performance S.E.T® model.

Key features

  • Unisex heated ski sock
  • Multiple adjustable heat settings via battery-pack controller
  • Built specifically for ski boots
  • Heating zone: Not specified beyond general ski sock heating
  • Battery life: Not published by Therm-ic
  • Material: Not published by Therm-ic
  • Battery: Therm-ic S-Pack (sold separately)
Pros
  • Multiple adjustable heat settings via battery-pack controller, as described by Therm-ic
  • Built specifically for ski boots
  • Lower price than Therm-ic's own Ultra Warm Performance S.E.T® sock
Cons
  • Battery packs are sold separately
  • Therm-ic doesn't publish an exact battery-life figure for this model
  • No confirmed current-model Amazon listing was found

Before you buy: Battery packs are sold separately. Therm-ic doesn't publish an exact battery-life figure for this specific model.

$139.95 — seen on therm-ic.us · Best for Recreational skiers who want an affordable, no-frills heated sock built specifically for ski bootsCheck price at Therm-ic

How the top picks actually differ

Toe-only heat vs. full footpad vs. surround heating

Most socks in this guide heat only the toe area (Fieldsheer Merino 2.0, Savior Heat, Snow Deer) or a thin line built into the knit near the toes (Therm-ic's two socks). The Lenz Toe Cap® goes further by heating both the top and bottom of the toes, Fieldsheer's Pro Merino adds a second zone over and under the foot, Gerbing heats the entire footpad, and Hotronic's Surround Heating Element wraps fully around the toes. None of these approaches is independently verified by Guidevio as warmer than another; this is simply what each brand publishes about its own design.

Physical controller vs. app control

Some socks, like the ActionHeat 5V and Therm-ic's two models, use a simple touch-button or battery-pack controller. Others — Fieldsheer's Pro Merino, Savior Heat's LYSS01G, Hotronic's XLP 2S BT, and Snow Deer's app-controlled sock — add Bluetooth app control for finer adjustment from a phone. App control adds a dependency on a smartphone and the brand's own app, which is worth weighing against the convenience it offers.

Battery life and included batteries

Published runtime figures range from up to 8 hours (Savior Heat) to up to 23 hours (Lenz, depending on battery pack) and up to 18 hours of constant heating power (Hotronic). Some brands, like Gerbing and Fieldsheer, include the battery in the purchase price, while Lenz and Therm-ic sell their battery packs separately, which adds to the real total cost of ownership.

Who should choose what

  • You want the best all-around ski-specific heated sock

    Heat Sock 5.1 Toe Cap

  • You need a slim heating line for tight race or performance boots

    Ultra Warm Performance S.E.T®

  • You want heat across your entire sole rather than just your toes

    7V Ultimate Wool Heated Socks

  • You need the longest per-charge runtime from an included battery

    Merino 2.0 Heated Socks (Mobile Warming® Technology)

  • You want dual-zone heat with phone app control

    Pro Merino Heated Socks Unisex (Mobile Warming® Technology)

  • You want the highest published maximum heat output

    5V Wool Battery Heated Socks

  • You want everyday app-controlled heat for commuting

    LYSS01G App-Controlled Heated Socks

  • You want the largest published battery capacity for backcountry skiing

    Heat Sock Set XLP 2S BT Surround Comfort EVO

  • You want app control at the lowest price

    Heated Socks with App Control

  • You want an affordable, no-frills sock built specifically for ski boots

    Powersocks Heat Fusion Uni

Common questions

Do heated socks come with the battery included?
It depends on the brand. Gerbing's 7V Ultimate Wool socks and Fieldsheer's two heated socks include their batteries in the listed price. Lenz and Therm-ic sell their rechargeable battery packs separately, so the sock's listed price doesn't cover the full system cost.
What's the difference between toe heating and full-footpad heating?
Several socks in this guide, including the Lenz Toe Cap® and Therm-ic's S.E.T® models, heat mainly around the toes. Gerbing's 7V Ultimate Wool sock instead heats the entire bottom of the foot, and Hotronic's Surround Heating Element wraps fully around the toes rather than heating from one side. This guide reports only what each brand publishes about its own design and doesn't independently compare warmth between approaches.
Which heated socks have app control?
Fieldsheer's Pro Merino, Savior Heat's LYSS01G, Hotronic's Heat Sock Set XLP 2S BT, and Snow Deer's app-controlled sock all offer Bluetooth app control, per their brand pages. The other socks on this list use a physical touch-button or battery-pack controller instead.
Which heated sock has the longest battery life?
Lenz's Heat Sock 5.1 Toe Cap is rated for up to 23 hours of heat depending on battery pack, and Hotronic's Heat Sock Set XLP 2S BT is rated for up to 18 hours of constant heating power from its 4400mAh battery — the two longest published runtime figures in this guide.
Is the Hotronic Heat Sock Set XLP 2S BT's price published?
No. Hotronic doesn't publish a price for this set on its U.S. brand site; it's sold through authorized dealers, so buyers should confirm current pricing directly with a dealer before purchasing.
Are heated socks specific to ski boots, or can they be used for other activities?
Some socks in this guide, like Lenz's and Therm-ic's, are marketed specifically for ski boots. Others, including Gerbing's, Fieldsheer's, ActionHeat's, Savior Heat's, and Snow Deer's, are marketed more broadly for motorcycling, hunting, outdoor work, or everyday cold-weather wear, per each brand's own positioning.

Sources consulted

Official product pages, specification sheets and retailer listings used to compile this guide.

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