Water Gear Master Hand Paddles - for Swimming Stroke Training with Adjustable Strap for Men and Women - Curved Ergonomic Endurance and Strength Training Equipment - Water Gear Master Hand Paddles with Palm Hole is best used to train for your strength, endurance, and speed. With continuous workouts with your swim trainer, you'll get to finish a lap in a shorter time! The added resistance help keep your arms lean and strokes stronger. We have strategically placed multiple holes on our swim paddles to allow the flow of water to make sure you feel just enough resistance while you swim. We have three sizes available for you that you can easily classify based on their color. Green for small sizes, Tan for medium, and Purple for Large. These swimming equipment paddles have adjustable straps which can be tightened or loosened for a more comfortable fit on your hands.