The socks begin warming your feet within seconds using a compact, rechargeable 7V lithium-ion battery. The advanced heating technology allows you to maintain a constant level of thermal comfort and protection while enjoying your favorite outdoor activities.

Features:

• Constructed of thin, lightweight Lycra Spandex
• Moisture wicking plus wind & water resistant
• Features a wide elastic band with a Velcro strap for an adjustable, comfortable fit around your calves
• Heating elements are located at the top of your foot then wrap around your toes and under your foot
• Includes a y-harness to run up your legs and connect to 7V batteries
• 2 batteries combined time 2-8 hours (depending on setting)
• Max Heat 135° F
• Package Includes Everything Needed For Operation: Dual Wall Charger, (60”) Y-Harness, (2) 7.4V / 3500mAh Rechargeable Lithium-Ion Batteries