HotHands' Toe Warmers are single-use, air-activated air packs that offer up to 8 hours of warmth for techs on chilly shop floors. Ultra-thin and featuring an adhesive backing to stick to stick within work boots, the toe warmers are odorless and disposable. Simply shake to activate, and warmer will heat in 15-30 minutes. Offered as toe warmers, insole warmers, and in large sizes for shoe sizes 10 and up.