Yaktrax® Adhesive Toe Warmers are a safe, easy, and all-natural solution to painfully cold toes. Once opened and exposed to oxygen in the air, these disposable but environmentally-friendly warmers begin working in just minutes. Apply them directly to the top of your socks to form a radiant barrier of warmth inside your shoes that lasts up to 5 hours. Yaktrax Warmers are the ideal choice for outdoorsman, winter athletes, spectators, and anyone who works or plays outdoors.