Heated Insoles, Sweet Mall Cut-to-Fit Multiple Sizes Unisex Flexible Rechargeable Heated Shoes Insoles Boot Mobile Foot Warmer for Hunting Fishing Hiking Camping RECHARGEABLE FOOT WARMER: This is portable rechargeable battery operated foot warmers insoles. Rechargeable lithium ion polymer batteries are mounted to your ankle via elastic ankle belts. These heated shoe soles comes with charging cable, and the batteries can be charged via power bank, mobile phone ac adapter or included original ac adapter HIGH CAPACITY: High capacity batteries offer 2-4 continuous hours of runtime with fully rechargeable Batteries. Warming time is varies in different environment. The temperature will reach up to 110 F to warm cold feet in winter MOBILE CAMPING FOOT WARMER: The heated shoes inserts is made from soft elastic EVA-foam, Thickness is approximately 0.19 In . Your feet don't feeling any tight squeeze when the foot insoles fit in to your shoes VENTED DESIGN: This electric insoles can be bent by 180 degree. It is washable, reuseable. And you can wash it via brush.(not for machine washing). This battery foot warmers are the perfect solution to your cold feet- Keeping your feet warm without getting hot to the touch and making them sweat ONE SIZE FIT ALL: This unisex heating sole insoles can be cut into your size. The heated footwear fit for US men and women Shoes Size 7.5-12. No more returning request for incorrect size! Best unisex heated boot insoles for indoor office or outdoor winter sports, chores,hunting, hiking,camping, ice fishing etc