More Advantages of Tumaz Exercise BallThis is the most durable anti-burst ball on WALMART! Given the same size, our balls use 100 to 500 grams more material compared with other competitors.Our ball meets medical grade/gym grade requirement which can be safely used as a birthing ball.Easy to clean: use water to clean dust or sweat after each use.Slip resistant: the ball body has matte surface with surrounded horizontal ribs. The structure makes you easy to hold it without slipping. Specifications55cm: 1,300 g65cm: 1,500 g65cm with printed exercises: 1,300 g75cm: 1,700 gMultiple colors: pink, green, purple, grey (gray), blackMaterial: Phthalates-free PVC. Meet US California Proposition 65 standards. About TumazWe are a bunch of friends who are enthusiastic to fitness for a long time. We have various sport interests but share the same goal - keep fit and get healthy.With our enthusiasm and exercise experiences for years, we are proud of presenting our fitness products to you. Our products not only use premium material but also have lovely designs. Moreover, the price is attractive given its premium quality.Our vision is to be the most customer centric fitness company. So, we care what you care - function, safety, looks, and price! 60 Days Worry-Free GuaranteeOur goal is to make you 100% satisfied with your purchase. With the confidence of our products, our money back warranty is 60 days which is two times longer than WALMART's standard return policy. So, if you are not 100% satisfied with our product, simply return it within 60 days and have your money refunded. No reason given. No weasel words. No hassle.