Yaktrax 5-Hour Adhesive Toe Warmer 10 pair of adhesive backed toe warmers; each pair provides up to 5 hours of heat Safe, natural heat; odorless and environmentally friendly Air activated warmers begin working upon opening Ideal for keeping warm when camping, hunting, fishing, skiing, watching sports and outdoor events, and more Dimensions per warmer: 3.5 x 5 x 0.25 inches