Yoga Pilates Exercise Ball Mini 9.8 Inch for Stability Balance Training for Core Training Physical Therapy, Improves Balance Inflatable Straw at Home or Gym or Office HIGH QUALITY & PROFESSIONAL PERFORMANCE - Made of soft, low-odor, flexible, durable PVC. Gym grade with anti-burst and non-slip,can remain elastic and squishy in any complex posture. High security-Fitness ball is relatively safe in exercise, and it is not easy to cause injury. 9 INCH MULTI-FUNCTION MINI EXERCISE BALL-It is suitable for sisters with over-weight lower abdomen, hands and legs. Fitness ball has a good function of injury recovery and rehabilitation (especially for spinal and pelvic exercises).