The Mega Warmer offers maximum heat average 135 degrees in a larger pocket sized warmer. Ideal for sleeping bags, pockets, emergency kits, or any time you want to stay warm. Mega Warmer is odorless, clean, dry, non toxic, non flammable, and biodegradable. No shaking or kneading required simply open package and use. Grabber Warmers is a recommended product by the National Ski Patrol. Grabber Mega Warmer is great for hunting, camping, emergency use, snow sports and spectator sports. Also great for relieving pain associated with arthritis and poor circulation. Maximum Heat in a pocket sized warmer. Lasts 12 hours. Pack weight: 2.25 oz. Average temperature when activated 135 F. Product size: 4 x 5. One warmer per pack.