HeatMax HotHands Toasti Toes Air-Activating Foot Warmers with full adhesive on one side that sticks to your socks for up to 8 hours of warmth. Not recommended for those who would be stationary for long periods of time. Made in USA.Manufacturer model #: TT-1.HotHands Keeping hands, feet, or one?s body warm in cool or cold weather is always a concern of the avid outdoorsman. HotHands warmers are made of natural materials. Once removed from the specially designed outer packaging the exposure to air activates the ingredients and the warmer begins to build heat. Always allow 10 to 20 minutes for the warmers to reach their optimal temperatures.