Before wakeboarding was invented, water sports pioneers of the '60s experimented with objects to ride behind the boat. Some of the more successful riding devices were wooden discs. Grandpa would take a piece of plywood to his woodshop and cut it into a circular shape. The family would take turns "discing" in between water ski sets. It was a great way to introduce people to riding behind the boat without the learning curve associated with waterskiing. 50 years later, Hyperlite combined the nostalgia of the past with the advanced materials and construction methods of today to give you the all new RAD Disc. Round Aquatic Devices (RADs) allow anyone, regardless of skill level, to participate in a day behind the boat. Everyone is guaranteed to get up on the 4' RAD+...just put the handle in the handle hook; sit, stand, or kneel; and away you go. The riding possibilities are endless. Fun for all ages, the RAD is guaranteed to turn some heads on your lake this summer. NEVER GET BORED - STAY RAD; KNEEL, LAY, STAND, OR SIT - multiple riding option; SOFT EVA HANDLE HOOK - for hands free starts/riding; DUAL LAYER NEOPRENE PADDED HANDLE - for steering and reboarding; 10CM (4IN) THICK WELDED DROPSTITCH CONSTRUCTION; MARINE GRADE EVA DECK PAD - This soft marine EVA layer is incredibly comfortable for extended trips and gives you the traction you need on your next adventure.; DUAL ACTION HAND PUMP WITH PSI PRESSURE GAUGE;