This is the inflatable watercraft that converts from a windsurfer to a sailboat. The 11 1/2'-tall aluminum mast supports its 33' sq. PVC sail, which is reinforced by three fiberglass battens that keep it taut during gusts for consistent powered gliding. The integrated boom provides deft steering of the sail by hand when used as a windsurfer, catching the wind easily while you keep a sturdy foothold on the hull. Transporting a captain and first mate over the water up to 10 mph as a sailboat, the sailing harness secures to the hull at seven points for optimal stability, a tiller controls the included rudder. Two keel blades provide reliable tracking and dexterous turns. The sail's transparent window allows visibility. Supports up to 400 lbs. The included foot pump inflates the craft's 102" L x 60" W x 20" H durable PVC hull in just 10 minutes. Stows in less than 10 minutes and fits into a rolling storage bag that easily fits into a car trunk or boat. Minor assembly. (60 lbs.)