eatures 4 neoprene knuckle guards and deluxe nylon-covered handles that provide a sure and comfortable grip. The heavy-duty virgin PVC bladder has electronically welded seams and a Boston valve for quick inflating and deflating. BLAST has a double stitched nylon cover, reinforced internal tow harness and a self-draining floor vent. You'll love the eye-catching graphics on this 1 rider 54" round towable tube.