Yaktrax disposable Adhesive Toe Warmers are an incredible heat source for anyone in the cold. They are environmentally safe and odorless. Once opened, these bad boys begin working within minutes and stay consistently warm for up to 5 hours. These toe warmers stay in place with a simple adhesive backing. Just peel and stick them into your boots or shoes to keep your toes warm while camping, skiing, fishing, hunting, you name it!