This Hardcore® heavy duty river tube is the perfect solution for the tubing enthusiast. The cover measures 44" inflated. Diminishing size tube measures 13.5" diameter in the back, and 11" diameter in the front. The center hole measures approx 20" in diameter. Welded, triple layer reinforced PVC shell pumps up just like a whitewater raft and is made out of the same materials as our whitewater rafts and inflatable kayaks. The tube is made from heavy duty 1100 denier PVC. Drain holes on the bottom allow water to pass freely through the center of the tube while providing superior abrasion resistance. Grip handles are placed intuitively on each side of the rider, while this patent pending seven-sided float provides obvious position for head, hands, and feet.