Meister Battery Heated Socks - 8+ Hour Model w/ Temp Control

Integrated heating element provides full toe box warmth Variable temperature control with 4 heat level options for your desired comfort level 8+ hours of heat per charge! Over-the-calf design won't slide down unlike other socks Batteries secure comfortably at the top of calf in convenient pockets Unique wool/cotton/spandex blend provides combination of warmth and comfort Includes 2 rechargeable high capacity 3.7V 4000mAh battery packs USB-C output can be used to charge your phone Ideal for winter sports, hiking, spectating and chronically cold toes