Comfort: The ergonomic holes on the paddle board can reduce shoulder pressure and fatigue, and provide a better sense of water. Material: The swimming hand pat is made of PC material, which is light in weight and will not bring additional burden to swimming.Use adjustable shoulder straps: Practicing with arm strokes, the self-swimming mesh belt will not obstruct the blood flow in the hands. Easy to use: Practice strokes, self-swimming fins, hydrodynamic shapes and adjustable silicone straps to master all four strokes as early as possible. Ergonomic design: The convex design of the hand oar increases the traction of the water. Product Specipication Color: black Features: Comfort: The ergonomic holes on the paddle board can reduce shoulder pressure and fatigue, and provide a better sense of water. Material: The swimming hand pat is made of PC material, which is light in weight and will not bring additional burden to swimming.Use adjustable shoulder straps: Practicing with arm strokes, the self-swimming mesh belt will not obstruct the blood flow in the hands. Easy to use: Practice strokes, self-swimming fins, hydrodynamic shapes and adjustable silicone straps to master all four strokes as early as possible. Ergonomic design: The convex design of the hand oar increases the traction of the water. Training aid: The hand oar has many drainage holes and water channels, and the low impact force allows you to exercise your muscles safely. Specification: Material: PC Color: blue, black, silver, orange Size: about 19.5*13.6 cm/7.68*5.35 inches (length x width) Package includes: 1 pair of swimming boards