FNDN Heated 3.7V Liner Socks

FNDN Heated 3.7V Liner Socks

$ 89.99 USD




FNDN Heated 3.7V Liner Socks

FNDN rechargeable heated liner socks with long working hours and cozy temperature will keep your feet warm and comfortable all day long.  The material is a moisture wicking, breathable stretch fabric that's thin enough to be worn under other socks or by themselves in tight form fitting situations.  Forget about frozen toes or discomforting pain in the winter mornings or evenings. We’ve found the solution for you by designing the thinnest form fitting rechargeable heated sock for women and men.

The liner socks are powered by our proprietary Radiant Core Heat™ technology and USB rechargeable BEGO battery system. This battery is the smallest & lightest in class, designed to provide the most power with the smallest footprint possible.

The heated sports socks offer enough warmth to provide great relief from poor circulation, arthritis, Raynaud’s Syndrome and any kind of winter cold issues.


  • Machine Washable (*Must Remove Batteries)
  • 4 Radiant-X Core Heating Levels including High, Med, Low & “Smart Pre-Heat”
  • 5-hour continuous run time
  • Small & Lightweight high-performance BEGO Battery System
  • Universal USB Charging


Fabric:  100% Acrylic; Soles: 65% Polyester, 25% Cotton, 10% Spandex


FNDN Heated Liner Socks Include:

  • 1 Pair Liner Socks
  • 2 3.7V Li-Ion Rechargeable “BEGO” Batteries
  • 1 USB Dual Battery Charging Cable


*Smart Pre-Heat: Features a battery-saving “Smart Pre-Heat” mode.  The pre-heat mode happens when initially turning the controller on. The LED is red, but will slowly flash red. The smart pre-heat occurs for the first five minutes and then automatically kicks to medium to save battery. You can bypass this level by simply pressing the button again.


Battery RUN Times

FNDN Heated 3.7V Liner Socks

LED Light Color

Battery Life

High - Red

75 min

Med - White

165 min

Low - Blue

270 min


Size Information:


  • S/M: Men's 4-9.5 and Ladies 6-11
  • L/XL: Men's 10-14

    Care Instructions:

    • Machine Wash Delicate (Remove Batteries)
    • Use No Bleach
    • Do Not Machine Dry
    • Do Not Iron

    Customer Reviews

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