FeaturesUp to 9 hours of heatReady to UseAir-ActivatedSafe, Natural HeatContains one pair per packageHothands Insole Foot Warmers are full-length foot warmers designed to fit inside shoes or boots. They are single-use air-activated heat packs that provide up to 9 hours of continuous warmth for the feet. These insole foot warmers are great for hunting, winter sports, tailgating, and many more outdoor activities. Contains one pair per package. 10 total foot warmers.