Encourages good posture. Reduces lower back pain. Strengthens core. Ideal for home office. Yes4All Exercise Office, 400lbs Capacity Anti-Burst Yoga Weight Self-Standing Sitting Ball Chair with Hidden Seam Cover Convenient Handle & Pump Included, Standard, Light Gray Anti Burst Pvc BALL OFFICE CHAIR CARE FOR YOUR HEALTH: The yoga ball office chair promotes posture, co re strength, and balance improvement; This office ball chair for posture adult prevents ba ck bend when sitting for long period of time at home or at work ANTI BURST PVC DESK BALL CHAIR: This anti burst PVC yoga ball chair for office is highly durable and stable, and it has an elegant non woven cover; Weighing under 4 pounds, this office chair ball is lightweight and easy to carry HIGH CAPACITY OF 400 POUND: The 400 pound capacity stability ball chair for the office is ideal for families; The yoga ball desk chair can be easily inflated between 22 and 24 inches; This sitting ball chair offers flexible seating for various ages