THE HEAT COMPANY Foot Warmers Adhesive Heat Insoles 8 Hours Air Activated 6 PairsFull Length Insole Coverage Designed to cover the entire bottom of the foot providing uniform warmth from the heel to the toes Extended Eight Hour Heat Duration Provides a consistent and reliable heat source that lasts throughout a full day of skiing hiking or working outdoors Instant Air Activated Technology Simply open the package and the warmers begin to heat up automatically upon contact with oxygen Safe and Natural Ingredients Contains a non