Lasts up to 6 hours! Ideal for outdoor activities (skiing, camping, hockey, football, bird watching), spectator events, sports programs, commuters, safety programs & more! Air activated portable heat. All natural ingredients, biodegradable Odourless, clean, dry, non-toxic and non-flammable Long lasting heat therapy for poor circulation or joint ailments Custom logos imprinted directly on package. Price includes a 1 color imprint on 1 location. Setup charge $50.00 per color/location.