SaryEdge Blue Ball Chair for Exercise Training, Ergonomic Yoga Ball Chair for Adults, Balance Stability Ball Chair for Classroom, Relieves Sore Schi(

? ? [Improve Posture] The Balance Ball chair can offer you a dynamic and comfortable sitting experience, combining comfort and ergonomic back support to relieve pain caused by long-term sitting and reduce back pain. ? ? [Healthy Fitness Ball Chair] The stability ball chair promotes continuous muscle contraction, stimulates blood flow, strengthens core muscles, and improves stability and balance. This product is also very suitable for use during pregnancy and childbirth. ? ? [Durable Material] The base frame of the yoga ball chair is made of high-quality ABS and environmentally friendly PE,sturdy and stable. The ball is made of thick PVC material, honeycomb structure, explosion-proof and can bear up to 160kg (350lbs). ? ?Easy to install and remove: installation is very simple. Simply connect the backrest to the base and install the 4 wheels, then inflate the ball with the included air pump and attach it to the chair. The Pilates ball and base are not connected and can be removed for exercises that only use the ball. ? ? [Inflation Instructions] You may need to re-inflate the ball after initial inflation to allow the ball material to stretch to the final size. Inflate the ball with air, let it rest for 24 hours, deflate to 50%, then inflate again to a height of 55 cm. (Be careful not to overinflate)