What You Get - Start working out using our easy to follow guide. Your mini fitness ball is delivered deflated and is inflated in seconds. Recommended by Physical Experts - The pilates ball is an effective training tool that help to improve stability and coordination, maximize strength and endurance, strengthen the core muscles. Professional Design and High Quality - Made from high-quality PVC material and an Anti-Burst coating that is able to sustain up to 600lbs of pressure and stand up to the most rigorous workouts. 9 Inch Multi-use Mini Exercise Ball - The Mini Exercise Ball is perfect for yoga, Pilates, barre, physical therapy or at home workouts that strengthens muscles, improves posture, balance, and core stability, helps prevent back and spine pain. Easy to Inflate and Store - Please see Inflation Guide as indicated in Fig.4. Come with inflation straw, which can be easily inflated into the perfect hardness for your exercise needs. The mini diameter makes the ball simple to carry and store for taking along on trips.