Grabber Warmers FWSMES Non-Toxic Foot Warmer, Specifications: 95 deg F Average, 5 hr Continuous Warmth, S/M Size

Ideal solution for cold feet. Very thin foot sole designed to function in the low oxygen environment of boots and shoes. Simply place the warmers inside your boots or shoes and enjoy at least 5 hrs of warmth. For hunting, skiing, sporting events and people who work outdoors.