A perfect liner for cold conditions made of Polyester and Elastane with laminated heating wires inside the back of the hand, fingers, and thumb. The Hestra Tactility Heat liner gloves deliver warmth on demand for truly cold activities. Comes with a rechargeable battery with a smartphone application available. Due to its suppleness, it can be used as an extra liner inside most other base or shell gloves. The heat system is by Inuheat. Heat duration: Low: 8 hours + – Medium: 3.5 hours  – High: 2 hours (approximately) The heating system by Inuheat features laminated heating wires inside the back of the hand, fingers and thumbs Rechargeable batteries stow away in Lycra® spandex pockets on the back of wrists Smartphone application available (Inuheat app in the app store) Can be used with most shell gloves when you need extra warmth Touch-screen compatible index fingers let you use your smart devices with the liner gloves on Machine washable Unisex 92% polyester, 8% Elastane Batteries charge from a USB C Connection. A regular USB-A to USB-C cable is supplied to connect to your own USB charger outlet. IMPORTANT NOTICE! The electronic components of this glove may interfere with avalanche transceivers. Tactility Heat Liner - 5 finger Gloves