PRECAUTIONS - Please read precautions & directions carefully. Low-Temperature Burn. Do not use directly on the skin or while sleeping. Do not heat in the microwave. People with allergies, sensitive skin, diabetes, nerve damage, paralysis, or circulatory problem should consult physician before use. Extra precaution for children, elderly, or physically handicapped. EASY TO USE - Air-activated, ready to use, disposable, odorless, safe, & natural. NO harm to environment. NO electromagnetic waves. Each one is individually packed.(5 Packs). FOR BEST RESULT, PLACE THE WARMER IN POCKET OR GLOVES. PURPOSE - (Indoor)Office, school, home, church, & all indoor activities and (Outdoor)Camping, hiking, fishing, skiing, concerts, amusement park, & all outdoor activities. Premium Hand Warmers. ACTIVATION - Shake and Massage gently to activate the warmer or when the temperature goes down during usage(Warmer heats up within 10 minutes) - AFTER ACTIVATION, PLACE THE WARMER IN POCKET OR GLOVES FOR BEST RESULT. DON'T PLACE IT IN OPEN AIR. (30 Pack) Hand Warmer - (Size: 3.5 inch x 4 inch, Duration: 12 + Hours, Max Temperature: 163 F). Hand Warmers Disposable.