Heated Breathable Thin Glove LinersProduct Performance Made of high quality Lycra, Polyester and Elastane. The interior is made of breathable and comfortable fleece. It absorbs moisture and keeps hands dry and warm. Invisible battery storage design stays in place and does not affect activities. The rechargeable batteries come with a plug and a USB charging cord so you can use them interchangeably with your phone. The thumb, index finger, and middle finger are all made of conductive PU