Ergonomically designed to give a snug fit over most seat shapes and sizes and can be used on motorcycles (sportbike or big cruiser/touring seats), snowmobiles and ATVs. Drymax outer seat shell allows fabric to breathe and helps air flow through seat; waterproof inner lining protects heat metal fibers from getting wet. Anti-skid bottom keeps seat in place once snapped on with adjustable webbing system; includes extra-long webbing for bigger seats. Provides full heat coverage and chill-free riding comfort; raises rider to a minimal height. Constructed using light and flexible Zepto heat metal fiber technology. Produces 17.4 watts of heat and draws 1.3 Amps of current. Comes with a 20″ battery cord and built-in ON/OFF switch.