FEATURES PVC Free Comfortable Fit Dimensions: 21 x 31.5cm Materials - mesh polyester silicone strap string steel inner Improve your stamina and strength by wearing these Arena Flex Paddles. They are comfortable and give a stronger workout thanks to the mesh panels. Designed to help the swimmer feel the water whilst providing a stronger pull. A secondary purpose of hand paddles is that they help your stroke technique by making you more aware of your arm and hand position by keeping your hand straight as it enters the water.