Keep warm, regardless of the weather! HotHands Air Activated Insole Foot Warmers insert into your shoes for long term heat. They are ideal for hunters, skiers or anyone who'll be out in the cold for hours. These insoles are air-activated warmers featuring a full adhesive and offering up to nine hours of heat. They are thin and easy to insert and will be comfortable all day long. These heated foot warmers are the answer to cold winter days. HotHands 9 Hour Adhesive Foot Warmer 1 Pair Pack: Quantity: 2 Individual Insole Warmers. Duration Of Heat: Up to 9 hours of heat. Activation Time: 15-30 minutes. Average Temperature: 99 degrees Fahrenheit (37 degrees Celsius). Max Temperature: 109 degrees Fahrenheit (43 degrees Celsius). Ingredients: Iron Powder, Water, Salt, Activated Charcoal, and Wood Fiber. Storage: Keep in a cool place out of direct sunlight. Ideal for hunters, skiers and more Features adhesive on 1 side Offers up to 9 hours of warmth