FNDN™ Heated 3.7V Sports Socks

Whether you’re lacing up boots, shoes, or skates, the FNDN™ Heated Sports Socks keep your feet warm and comfortable through long winter days. Designed for both men and women, these sleek rechargeable socks provide lasting warmth and relief for cold-weather discomfort, poor circulation, arthritis, or Raynaud’s Syndrome—without sacrificing fit or mobility.

Powered by Radiant Core Heat™ technology and the compact BEGO rechargeable battery system, these socks deliver four adjustable heat levels, including battery-saving Smart Pre-Heat mode, with up to 4.5 hours of runtime on a single charge. Built from a merino wool blend for natural insulation and moisture control, they’re the perfect all-day solution for everything from outdoor sports to cold morning commutes.

Features

• Four Radiant Core Heating Levels: High, Medium, Low, Smart Pre-Heat

• Up to 4.5 hours of continuous runtime

• Compact BEGO high-performance battery system

• Universal USB charging

• Machine washable (remove batteries before washing, lay flat to dry)

• Designed for use under boots, shoes, or skates

Fabric

• 65% Merino Wool

• 30% Nylon

• 5% Spandex

Includes

• 1 pair of FNDN™ Heated Sports Socks

• 2 BEGO 3.7V Li-Ion rechargeable batteries

• 1 USB dual battery charging cable

Size Information

• S/M: Men’s 4–9.5 / Women’s 6–11

• L/XL: Men’s 10–14

Care Instructions

• Machine wash on delicate (remove batteries first)

• Do not bleach

• Do not machine dry

• Do not iron
  
  

Smart Pre-Heat Mode

When first powered on, the LED glows red and slowly flashes during a 5-minute pre-heat cycle. Afterward, the socks automatically switch to Medium to conserve battery life. To bypass Smart Pre-Heat, press the button again.

Designed in Detroit