Big OThe Big O is a durable, fully covered round tube that handles well in smooth water, blasting off rough wakes or performing tricks. Riders can choose between laying prone or sitting in the center location. This proven design has endured the test of time and will keep you in the middle of the action behind the boat.56rdquo; Diameter (deflated), preassembled with 1 year warranty Single rider, fully covered round tube 420D Nylon cover, fully enclosed, heavy duty PVC bladder Four padded handles with knuckle guards for added safety Boston valve for easy inflation Quick connect tube rope attachment Covered mesh bottom drains excess water Peel and stick repair kit included