The Manbi Bodywarmers are perfect for a cold day providing 12+ hours of continuous warmth The Manbi Bodywarmers are made from all natural ingredients are best used insulated within a pocket or a under a layer of clothing & are self adhesive The Manbi Bodywarmers can also easing aches caused by muscle & joint pains for soothing tummy ache & for keeping warm when you are skiing snowboarding camping hiking or participating in outdoor activities