GrabberA(R) Body Warmers are a non-toxic and environmentally friendly heat source that stays where you stick them! Perfect for outdoor lovers or soothing aching muscles looking for heat that will last all day. Remove protective backing and apply adhesive side of warmer to under layer of clothing (avoiding the skin) and enjoy up to 12 hours of warmth! Warmer Features: Ready to use Adhesive Air activated Safe, natural heat Heats up 15-30 minutes after opening Safe to dispose of with regular garbage; ingredients will not harm the environment