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Hotronic XLP One PFI 50 Heated Ski Socks

Hotronic XLP One PFI 50 Heated Ski SocksHotronic XLP One PFI 50 Heated Ski SocksHotronic XLP One PFI 50 Heated Ski SocksHotronic XLP One PFI 50 Heated Ski SocksHotronic XLP One PFI 50 Heated Ski Socks

Hotronic XLP One PFI 50 Heated Ski Socks

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Powered by high capacity, lithium-ion Battery Packs, Hotronic's Heat Socks XLP ONE offer three (3) base level settings for comfort and warmth maintenance while Boost Setting 4 offers an extra blast of heat when needed.

The Heat Socks Set XLP ONE - Classic Include:

  • Battery Packs XLP ONE (2 each)
  • Recharger XLP (1 each)
  • Heat Socks XLP PFI 50 - Classic (1 pair)

Heat Sock Product Features:

  • Includes 2 Lithium-Ion Batteries
  • US and European Charger
  • 70% Nylon/20% Spandex/10% Marino Wool
  • Machine Wash/Air Dry
  • Fantastic Wicking Ability
  • Consistent Heating Power
  • Perfect for Diabetics or People with Reynauds Syndrome

Heat Sock Product Specification:


  • Weight: 76 grams / 2.68 ounces
  • Height: 25 mm
  • Width: 70 mm
  • Depth: 35 mm
  • Cell Count / Type / Capacity / Energy: 1 cell / Li-Ion / 2900mAh (nominal) / 10.4 Wh (nominal)
  • Battery Pack Voltage: 3.6V (nominal)
  • Temperature Range when Charging: +10 to +30 \xB0C / +50 to +86 \xB0F
  • Operating Temperature: -20 to +30 \xB0C / -4 to +86 \xB0F
  • Ideal Storage Temperature: -20 to +20 \xB0C / -4 to +68 \xB0F
  • Charging Time: Approximately 5 - 6 h


  • Voltage Input Range: 100V to 240V AC
  • Voltage Output Range / Current: 5V DC / 3.1A
  • Operating Temperature / Humidity: +10 to +30 \xB0C / +50 to +86 \xB0F +20% to +85% relative humidity (no condensation)
  • Base Unit Dimensions (withOUT Plug Adapter): 54 mm x 54 mm x 27 mm
  • Power Cord(s) Length (Base Unit to Plug End): 156 cm
  • Weight (withOUT Plug Adapter): 5.1 ounces
  • Weight (with Plug Adapter 120V): 5.3 ounces
  • Weight (with Plug Adapter 240V): 5.6 ounces


  • Material composition: 74% Nylon 20% Elasthan 6% Merino Wool
  • Possible Sizes: S, M, L and XL
  • Care: Machine washable up to 30 \xB0C (86 \xB0F) / Air dry

Hotronic Keeps Feet Warm:


When colder outside temperatures are detected, the nervous system restricts blood flow to the extremities to maintain the body's core temperatures. The toes (and other extremities) quickly become uncomfortably cold.

Other factors aggravate the situation such as impossibly cold and poorly fitting footwear, physical activity levels, individual physiology, and improper selection, use, and care of socks. Also, the presence of moisture (damp socks, wet footwear) increases thermal transfer significantly. This causes heat to escape more rapidly and cold to penetrate faster.



By providing a base level temperature at the toes, Hotronic's Heating Element blocks and neutralizes the penetrating cold keeping the blood circulation open while maintaining comfort and warmth in the feet.

Hotronic's Heat Socks XLP ONE offer three (3) base level settings for comfort and warmth maintenance while Boost Setting 4 offers an extra blast of heat when needed

Simply slip the heated insoles into your footwear or pull the Heat Socks onto your feet and plug them into the rechargeable Battery Packs. Then fine tune the temperature setting to 1, 2, or 3 for comfort and warmth maintenance.



Whether planning for a brief outing or a long term journey, Hotronic's Heat Socks XLP ONE are easy to use in all types of footwear. Use while skiing, snowboarding, bicycling, horseback riding, fishing, and during other cold-temperature activities.


The following Hotronic Heat Socks XLP Series models are covered under the following Hotronic Limited Warranty.

Hotronic Heat Socks XLP Series Models and Production Years:

  • Heat Socks XLP ONE (2016-2017)


The Hotronic Heat Socks XLP ONE carries a limited warranty of two (2) years from the date of purchase for the Heat Socks XLP ONE. This limited warranty shall only apply to original purchasers who bought the new Heat Socks XLP ONE from an authorized retailer. Dated proof of purchase must be provided. Hotronic will only replace or repair parts of the Heat Socks XLP ONE which are defective as a consequence of workmanship or material defects. This limited warranty does not extend to damage ascribed to improper use, negligence, misuse, or any use not included in the operating instructions. Furthermore, the following are excluded from the warranty: normal deterioration, change in appearance e.g. color, breakage (with the exception of a specific breakage caused by manufacturing defects), improper maintenance by the retailer or purchaser, improper product modifications performed by the retailer or purchaser, product loss as a consequence of poor fastening, normal temperature deviations per heat setting or deviations regarding the product's heating duration on a certain heat setting after charging which results from the battery charging process or the conditions in which the Heat Socks XLP ONE are used and tolerances of the Battery Packs XLP ONE's batteries and electronics.

This limited warranty is the only warranty issued to the purchaser.

Other express or implicit warranties are not accepted. Neither WINTERSTEIGER nor the retailer is liable for incidental or consequential damage of any kind which can be ascribed to the use or possession of the Heat Socks XLP ONE.

If a defect emerges with the Heat Socks XLP ONE during the limited warranty period, the owner should promptly return the product to an authorized retailer. Dated proof of purchase must be provided. If the Heat Socks XLP ONE or part of them are replaced or repaired, the warranty period for the replacement product/part or the repaired product/part corresponds to the remaining term of the original limited warranty from the date of purchase of the original Heat Socks XLP ONE.

Whether you are looking to maintain comfort and warmth in your feet or keep your boots, shoes, gloves, and mittens dry, Hotronic has the solution to meet your needs.

Product Reviews

Review Summary
7 Reviews
86% (6)
14% (1)
0% (0)
0% (0)
0% (0)
100% Recommend this product (7 of 7 responses)
By Ski C.
Bend, oR
Happy feet
February 2, 2023
I have used these sock a couple times so far and am very pleased with how they work. My feet are happy and warm.
The batteries are larger than I expected, but I do not notice them at all while wearing them.
Thin socks fit well in alpine ski boots Keep my feet warm The battery are rather large, and will be a bulge when wearing my XC ski pants, but a small price to pay for warm feet. They don
By Randyman1
Vail, Co
December 5, 2022
Work fantastic, use them in my ski boots, but also wear them at outdoor winter events as well.
I donít need the Bluetooth version as these work great.
Get a second pair so you always have a fresh pair on hand.
Way better than a heated footbed in ski boots as now you can use them for fishing, hunting, football games as well as skiing or boarding Not the easiest to get on and off
Sedona, AZ
Great Socks
December 2, 2022
As with all Hotronic products, these socks are well made and they DO keep your feet warm. They are a bit of a bear to put on with arthritic hands, but after the struggle, it is worth it!
Well made Excellent heat distribution Long lasting battery Difficult to put on On/Off switch is difficult to find and use when covered with thermal wear and outerwear
By William R.
Farmington Utah
Work until you loose a battery
April 6, 2022
I bought these so I could ride bicycle in cold weather. My feet tend to become cold and numb even in temperatures well above freezing. I have worn these riding down to 20 degrees F and even a bit colder. Hereís the deal, I canít say these make my feet toasty warm, I agree with reviews that say they couldnít feel the difference. What I can say is when I wear these my feet may feel a bit chilly, but they have never turned numb, even in the teens. Without them my feet turn numb and I spend the next hour with aching toes and feet as they warm up. And that is in the +50 degree range. Yes my feet tend to feel on the cool side, but they donít turn numb.
By Anonymous
Boulder, CO
January 4, 2022
Purchased these as a gift for the fianc? and they kept her feet warm during a 2-degree day of snowboarding.
Works as advertised