Warming packs N-Ferno® 6990. Fits gloves, pockets, and the inside of clothing against the body. Contains 2 pcs. Not self adhesive. Self-contained packs activate when exposed to air. To activate, just open the pack. All natural ingredients heat up when they contact oxygen. Hand style warms up to 12 hours. Provides warming to the hand and will fit in gloves. Carton: 40 pcs.