HotHands Insole Foot Warmer SAFE, NATURAL LONG-LASTING HEAT - Odorless, Disposable, Single-Use Item, Do Not Apply Directly to The Skin. TSA Approved. Made in the USA using domestic and imported materials. TO ACTIVATE - Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and shake. After use, dispose with regular garbage. Ingredients will not harm the environment. MULTIPURPOSE WARMERS - Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature gets cold. Theyre available in several styles designed for your hands, feet, and body. QUAILTY - To ensure you receive genuine HotHands products when shopping online, please only purchase from authorized distributors or retailers or an Amazon listing that clearly states the product is sold and shipped directly by Amazon. com. WHEN TO USE: Tailgating at Events, Outdoor Sporting Events, Hunting & Fishing, Camping & Hiking, Working in The Yard, Jogging or Taking Your Pet for A Walk. Convenient, Compact, Portable. Each pair provides up to 9 hours of heat with adhesive on one side so it stays where you stick it Ready to use, Air activated Safe, Natural heat Contains 5 pairs per package