The revolutionary finger cap heating element guarantees all-round warmth for fingers and back of the hand. The unisex mitten provides warmth for up to 10 hours. The optionally available lithium packs are attached to the glove with snap fasteners. Lithium battery packs must be purchased seperately. The degree of warmth can be easily determined on the lithium pack or via the free Lenz heat app on a smartphone. PrimaLoft (R) and Hippora (R) offer reliable protection against the cold and are waterproof and breathable at the same time. The heat glove 6.0 finger cap mittens unisex also has an element for cleaning glasses, an elastic safety loop and is touchscreen compatible. Lenz Heat Glove 6.0 Finger Cap Mittens Unisex | Black | X-Large | Christy Sports