Sweet Cheeks use the same nylon as the Fun Floats, Footbags and Happy Seat. What makes Sweet Cheeks so special? The Sweet Cheeks form fits around your rear end to make a perfect bucket seat. No pressure points No more sliding around on your seat. Just get in after you inflate it about 4 breaths worth. When you sit on it the air will rush out of the tube, while the beans rush around to find a place to go until the air is mostly out. To lock it in for as long as you like your setup, simply suck the remaining air out and viola! It is a perfectly locked down seat pad that wont slip