Firstgear Heated Rider Gloves - Large/Black DC-heated, produces 15 watts of heat at 12.8 Volts each glove and should be used with a Firstgear Heat-Troller for optimum safety Firstgear Heat-Troller required to operate gloves independently See Demo Video for more information Grade-A, top-grain, drum-dyed cowhide construction Porelle breathable, waterproof membrane Thinsulate layer