The TYR Kickboard is engineered for swimmers on all levels. The TYR's Kickboard is the perfect training aid for swim training and aquatic exercise routines. It is designed to build leg strength and efficiency. The Kickboard immobilizes the arms and isolates the legs so that your body works harder with every kick. Not only that, it also makes every kick a perfect one. So, go ahead and be more perfect and learn that stroke better. It is built to last. It is constructed of durable, closed cell EVA foam, for extended life and performance in the water. The TYR's Kickboard measures 20 in. x 11.5 in. (50.8 x 29.2 cm.) and is available in Black or Yellow.