The patented swimming tool of the "Fleeflow" series (Pullbuoy) is innovative and ideal for training and improving the "Stroke" technique in the water. It can be used to improve endurance and stroke technique (pull and bring towards your side). The hydrodynamic design of the "8-Forms/Shapes" does not reduce the speed in the pool. It positively affects the flow of water and reduces resistance from friction. With a soft surface and curved edges for added comfort. PVC-free.