The Vortex Evolution Hand Paddle from Arena is a medium-sized swim paddle designed for swim training and will work to strengthen the muscles in your upper body to make you more powerful in the water. This hand-held paddle creates water resistance so that you have to pull harder through the water, which in turn strengthens the muscles in your back, chest shoulders, and arms. FEATURES Purpose - to create water drag to build upper body strength Improves your stroke technique by forcing your hand to stay flat Ergonomic shape to reduce shoulder strain Entry/exit holes for the perfect feel of the water Soft edges for safety in the pool Dual material densities for better grip and comfort Adjustable tubular hand strap to ensure a perfect, customised fit Material: dual injection PP/TPR Dimensions: medium (19cm x 17cm)