The FUNBOY Floating Dock has a 7.5 foot diameter and features a solid surface area for lounging out of the water. ? Features a large removable backrest to create the most luxurious Leisure Island. The base chamber is made of new heavy duty, next generation drop stitch material with thousands of internal fibers to create a sleek, flat surface strong enough to drive a car over when properly inflated. Perfect for the boat, lake, pool or beach. Welcome to the future of leisure.?