Trideer Ball Chair Yoga Ball Chair Exercise Ball Chair with Base for Home Office Desk, Stability Ball & Fitness Ball Seat to Relieve Back Pain, Home Gym Workout Ball for Abs, Pregnancy Ball with Pump

【Improve Posture & Relieve Back Pain】- Using our yoga ball chair for office can improve your sitting posture; strengthen your core muscles; reduce lower back pain to encourage a healthier life style 【Help Improve Childbirth】- The micro movements promoted by sitting on the pregnancy ball chair at home stimulates your body constantly, resulting in a heightened flexibility to help birthing 【Stability and Safety】- Our yoga ball chair is made of non-polluting and hypo-allergenic material; rated up to 330 lbs. The base keeps the stable ball from rolling around. The 65cm exercise ball is recommended for customers 5'3” to 5'10” in height 【Anti Burst & Slow Deflation 】- Our ball chair is made with the honey comb structure; when being punctured by sharp objects,the ball will slowly deflate within 3-5 seconds.No abrupt explosion to reduce the chance of injury significantly 【Inflation Instructions】- Inflate the ball to about 80% of the recommended size firstly; leave on for 1-2 days, then inflate to the recommended size. Inflate the ring base in the same way as for the ball; only 30 to 40 pumps to reach perfect condition