Designed by Jun Konno, a world famous aquatic exercise innovator and coach, the Kiefer Konno WonderBoard isn't a kickboard. This unique V-shaped stability board is excellent for core muscle development, overall strength training and aquatic rehab. It is made from a highly buoyant premier quality foam for excellent durability. Sit, stand, or kneel to challenge balance, improve coordination and core stabilization. Kiefer - The First Name in U.S. Swimming since 1947.