Like a puffer jacket for your hands: gloves with very light weight surface fabric and top notch insulation. Made for mountaineering and belaying, these gloves are ready to serve us regular folk, too. The manufacturer recommends these gloves to be used between the temperatures of +4 ... -15C, but situations and people's ability to handle cold vary in a big way. - Surface: Pertex Quantum Nylon, made of 100% recycled fiber - PrimaLoft Cross Core insulation - Faux leather reinforcement on palm - Stuff sack included Black Diamond gloves come with a two-year warranty against manufacturing and material defects. Black Diamond took its name from the difficulty rating of skiing and mountain biking trails: the symbol for the most challenging level is a double black diamond.