All products mentioned are for maximum agility. They are not a solution for speed or endurance. There is a difference, as I am not an endurance athlete. However, for me, one of the benefits of agility, is the ability to keep a straight posture in the water. This is more important for swimming. This is a product for maximum agility. It can increase your swimming, swimming at the bottom of the pool and also increase your water safety. There are many products in the market for the underwater world. It is important to know the benefits. The underwater world is extremely safe. There are few dangers. This product is for swimming. It will help you to keep your swimming distance. It is the best for swimming and swimming without any problem. Sensors for underwater swimming are becoming more powerful. With the latest sensor technologies, we can now measure the depth of water and calculate how much distance you are from the surface. You can also get this product in black, white and bright color. Our swimming distance can be increased by 1,065 cm, and it is made of the most popular materials: plastic, PVC and aluminium. We offer a great selection of different sizes and colors.