The Fury is the smaller of the two tubes in the Hardbody line. Perfect for smaller kids or grownups that want a more agile tube under them. The heavy duty molded PE bottom not only makes this tube glide over the ocassional piece of debris or exposed ground without harm to the tube, but also makes for the fastest possible inflatable sled you can buy. It's the perfect combination of disk sled fun and speed with inflatable tube comfort.