Vent holes in the training paddles provide a natural feel of the water, so the fluid of each stroke is unimpeded, low impact will allow you to build muscle safely. With it, the speed of moving forward in the water will be effectively improved. Swim paddles for lap swimming with convex design, provides increased traction with the water, ergonomically designed shape perfectly fits your hand shape. The swim hand paddle is made of high quality PC material, which is strong and not easy to deform and light in weight, assist you in swimming without feel burdened. Adjustable hand strap is great for most size hand. The strap can be adjusted, and you can adjust it to the most comfortable length according to the thickness of your palm. Help you practice your swimming, like freestyle, backstroke, breaststroke and butterfly. Make swimming more labor saving. Suitable for swimming beginners to improve swimming skills and enhance arm strength.