Ergodyne N-Ferno 6990 Activated Carbon Hand Warming Packs, 2.17"W x 3.74"D 40/Carton ()

Stay warm and comfortable no matter how cold it is with Ergodyne N-Ferno hand warming packs. These self-contained sachets are filled with natural ingredients that become toasty as soon as they're exposed to air. Opening a pack activates the pad, and each hand warming pack can keep emitting warmth for up to 12 hours. If you're only in the cold for a little while, store the partially used Ergodyne N-Ferno hand warming pack in an air-tight container, ready to use again. Self-contained hand warming packs heat up when exposed to air. Comes color. Hand warmer dimensions: 2. 17"W x 3. 74"D. Active ingredient is activated carbon; open the pack to activate. 40 warming packs per carton. All natural ingredients heat up when they contact oxygen. Seal from oxygen in Ziploc bag and reuse the next day. Hand warmers produce heat for up to 12 hours. Safety Data Sheet . Keep hands warm during cold winter days with Ergodyne N-Ferno hand warming packs.