HotHands Lap Warmer Warmer 1408713. With up to 8 hours of consistent warmth this air-activated warmer is perfect for any seated activity whether you're at a sporting event on a hunting trip or relaxing indoors. The large 16"x10" design makes it versatile and effective at keeping you warm and comfortable. Simply open the package expose the warmer to air and enjoy safe natural heat. Specifications for Hot Hands Lap Warmer: Manufacturer: Hot Hands Color: Red Features of Hot Hands Lap Warmer: Air-activated for hassle-free use Provides safe natural heat Heats up within 15-30 minutes after opening TSA-approved for travel Large size: 16"x10" Duration: Up to 8 hours Weight: 1.2 lbs Average temperature: 140F Maximum temperature: 163F Safe and eco-friendly ingredients: iron water cellulose activated carbon and salt Package Contents: Hot Hands Lap Warmer