Somersault Auxiliary Ball is made of premium PVC material and features multi threads design for uniform pressure release and pressure resistance. Somersault Assist Ball is designed with an automatic return feature that creates a sense of weightlessness when it bounces, making it great for backflip training. Sports Ball is with Max Load Capacity 600 LB heavy duty, nonslip, also equipped with detachable and adjustable shoulder straps, suitable for both kids and adults.For beginners, we recommend using it on soft surfaces such as beaches and adjusting the length of the shoulder straps. There 1 Yoga Ball in package, not easy to break, reliable, durable and lightweight, great for fitness and workout accessories.The components include a fitness ball, an inflation pump, and a valve racing tool. Somersault Ball is not only great for backflip training but also ideal for waist and abdominal training, yoga assistance, stretching, sensory integration training, and more.Unlocking the shoulder strap is a standard yoga training ball.