The revolutionary Finger Cap heating element guarantees all-around warmth for fingers and the back of the hand. The unisex mittens provide up to 10 hours of warmth. The optional lithium packs can be attached to the gloves using snap buttons. The heat level can be easily adjusted on the lithium pack or via the free Lenz Heat app on your smartphone. PrimaLoft and Hippora offer reliable protection against cold while being waterproof and breathable. The Heat Glove 6.0 Finger Cap Mittens Unisex also features a glasses cleaning element, an elastic safety loop, and is touchscreen compatible.