【Stability and Safety】- Our yoga ball chair is made of non-polluting and hypo-allergenic material; rated up to 330 lbs. Material Polyvinyl Chloride (PVC). 【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.
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