1Rechargeable: This is a portable rechargeable heated insoles. Rechargeable lithium ion batteries are mounted to your calf via battery bag 2High battery capacity: Offer 8-12 continuous hours of runtime with fully rechargeable batteries 3Temperature Adjustable. 3 levels (low/medium/high)to adjust, and set 30/45/60 mins to heat, warm cold feet in winter without too hot to sweat 4Cut-to-fit: These insoles can be cut in accordance with your needs 5Perfect solution to your cold feet: Best unisex heated boot insoles for outdoor sports, chores,hunting, hiking,camping,fishing etc.
