33'' diameter at rear of tube 38'' long. Single chamber tube is made of 100% heavy-duty PVC & is put over the rider like a shirt instead of being directly attached to the boat. Sumo Tube features: speed safety valve simple one-chamber design wide-open neck & arm holes. Sumo Splash Guard features: sleek inflatable armrest/handle w/splash-deflecting design heavy-duty double-stitched full nylon cover w/zipper double-webbing foam handles w/knuckle guards & simple one-chamber design. Simply connect a standard tow rope to the Sump Splash Guard & you can steer the Sumo tube back & forth jump the wake & roll 360s. Ideal for Sumo body surfing or simply use as a towable. Designed for 1 rider. Color: Red/Yellow/Black