The link to O'Brien Booker 4-Person Towable Tube has been copied
The Booker 4 towable has a durable 26/24-ga. PVC bladder with durable RF welded seams. Inflation/deflation is made easy with the patented Lightning valve, and hooking up is fast with the quick-connect tow hook. The Booker features an upswept U-hull that allow riders to lean away from turns, easily glide across wakes, and avoid excess spray on the deck. The SofTec top deck gives the smooth, soft feel that your body will appreciate, so there's no more uncomfortable rubbing or abrasions. Soft webbing handles provide a comfortable grip and allow easier boarding. 680-lb. weight capacity. 85" x 58".