Keeps hands really warm in winter. They are suitable for a wide range of outdoor activities in cold weather. They can help to promote blood circulation and relieve pain from rheumatism and arthritis. They have a very high thermal efficiency. Gloves are waterproof, allow ventilation and are soft, flexible, durable and comfortable. Uses ordinary AA batteries or rechargeable batteries or new blazewear Lithium Polymer batteries. Battery box has ON/OFF switch for power saving and heating duration between 2-4 hours with continuous use (3-5 hours with Lithium Polymer batteries which can be bought from blazewear. Heating location is in the forward part of the fingers. Wind and rainproof. Soft orange inner lining.