Dolfin kickboard this dolfin kickboard is an ideal accessory to help strengthen your legs through kicking training the durable build features a dense closed cell foam construction that will not absorb water while remaining safe and flexible simply place your hands at the top of the float and rest your arms on the float for proper use swimming float kicking training strengthens legs durable dense closed cell foam flexible l 21 in x w 12 in x d 15 in black