INCREASE DRAG RESISTANCE: Everyday swimming strength training resistance parachute makes forward movement more difficult. INCREASES ENDURANCE AND SPEED: Speed increases, and the increased drag provided by a drag parachute, provides a good training effect. NECESSARY TOOLS: The swim training exerciser improves swimming strokes for athletes and beginners who want strength training. It fits butterfly, backstroke, breaststroke, and strokes. VERSATILE TRAINING TOOL: It can improve the ability of the athlete to accelerate, muscle endurance, improves power, speed, and agility. EASY TO USE: This swimming belt with loop for installation. So you can hang the belt to any pole around the swimming pool. Specification: Material: Nylon Size: 10inchx10.98inchx2.01inch Package Includes: 1 Swim Training Parachute Note: Please allow slightly errors due to manual measurement and different monitors.