Feels very secure inside for young riders. Provides a wild but stable ride for all ages including young children, teens and adults. Comfort is guaranteed by the inflated floor and deluxe handles with neoprene knuckle guards. The heavy gauge PVC bladder and durable double-stitched nylon cover ensure years of service. Includes a patented Speed Safety Valve for easy inflating and deflating. Description Mach 1 Riders 1 Size 68" x 50" (deflated).