SUNVP Yoga Exercise Balls Anti-burst and Slip Resistant Fitness Static Strength Exercise Stability Physical Therapy Ball with Free Air Pump Material: Made of durable vinyl / PVC Sunvp yoga ball is great for yoga and strength exercise. Strengthens muscles, improves posture, balance, and core stability, helps prevent back and spine pain. Deflates slowly if punctured, use to exercises abs, back, glutes, hips, arms, and other muscles.Fit all,especially suitable for those who needs rehabilitation and wants better body shape. For men or women, stretch the limits of your physical fitness by integrating stability exercise into your workout or rehab routine. Easy to clean, comes deflated with two plugs, clean with warm soapy water and soft cloth.Keep away from fire or pointy things.