The ZANIER Heat Technology is based on highly developed textile heat elements and a unique electronic control system. The robust lithium ion batteries which weigh just 60 g provide heat at three different levels for up to ten hours. They are concealed in the ALPINE PRO HEAT cuff and you can hardly feel them. The gloves’ heating system is easy to operate with a single switch on the upper hand. The flame shaped LED light shows the chosen heating level (yellow, orange, red). The supplied USB charger unit recharges the batteries overnight. The gloves’ heating system is robust and even withstands hard knocks. This model was developed in cooperation with Austrian Mountain Rescue and is particularly ideal for use in extremely icy temperatures. Only top materials are generally used: the finest goatskin; 4-way stretch for comfort, extra warm and breathable TIROLWOOL® + Celliant insulation; REDA ACTIVE lining; leash.