CL-4 Snowboard BindingsRide CL 4 Snowboard Bindings The CL 4 is will take your riding to the next level. The C Series Chassis pairs an aluminum heelcup with a polycarbonate base tray. The aluminum heelcup provides the feel and durability of aluminum where you need it while the composite tray offers comfort and a smooth ride. The One Piece Ankle Strap offers all day comfort. The canted footbed aligns your joints with a 2. 5 degree angle while providing more leverage over the