These Heat Holders gloves combinie heat weaver thermal lining knitting technologies and the classic reflective hi-vis, a perfect accessory on those dark cold winter nights Advanced Insulating Yarn - High performance insulation against cold with superior moisture wicking abilities. Heat Weaver Lining - Is a plush fur like thermal lining that maximizes the amount of warm air held close to the skin. Protective Cuff - Improves fit and provides a protective sleeve that hugs the wrist for extra warmth and comfort. Heat Holders hi-vis gloves come in 3 colours including bright orange, bright yellow and black. The two lines that strike the wrist of gloves are reflective bands that allows light to bounce off for higher visibility in the dark