Description: Improve swimming skills: By increasing water resistance during swimming, swimmers exercise muscle strength, improve postures, and increase speed. Safe and effective: It can provide stable resistance training effects without posing safety hazards to users. It is a safe and effective swimming training tool. Comfortable fit: Made of Nylon+PP material, with good fit. The toughs and durable nylon webbing has good wear resistance. With 360degree rotating quick release buckle, it is firm and durable, with high flexibility and no twisting. Multiple sizes for selection: You can choose according to your personally needs and ability level. Users can gradually increase resistance, thereby gradually improving their swimming ability. Specifications: Material: Nylon+PP Color: Black/Yellow Resistance Umbrella Diameter: 20cm (7.87inch)/30cm (11.81inch)/40cm (15.75inch) Package Included: 1 X Set Swim Parachute Note: 1. Please note that the photo does not show actual size please refer to Description for size details. 2. Please allow differences due to manual measurement thanks. 3. Due to the difference between different monitors the image may not reflect the actual color of the item. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.