Waterproof leather gloves. The manufacturer has designed this model for temperatures between -4 ... -15ºC. - Surface material: high quality goat leather - Wide neoprene cuff with hook and loop closure - Waterproof, breathable BDry membrane - Brushed liner - Primaloft Gold insulation - Leashes 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.