1.[UNTI-Burst]exercise ball is made with built-in mesh + honeycomb double protection structure, which can maintaining the soft and comfortable experience while resist Even if it is punctured, it will slowly deflate. So you can do the most rigorous workouts without worring about bursting and deformation. 2.[UNTI-SLIP] The surface of the yoga ball is coated with anti-slip glaze and anti-slip lines, smooth but non-slip, help to stay stable and easily change positions. Whether at home, in the gym or outdoors, the high-quality anti-slip function is your guarantee of safety. 3.[SOFT & SKIN-FRIENDLY] ball is very soft, bringing you a unique experience of comfort and relaxation. no smell and harmless, skin-friendly, can be used by children and pregnant women. 4.[Multiple Usage] Excellent stability ball for fit, yoga, pilates, physical therapy, total body HIIT cardio workout. Do pregnancy gymnastics or soothe aches during pregnancy as a birthing ball.Can help improve posture and core strength, relieve back pain as office ball chair.Flexible seating for classroom as a sitting ball for kids. 5.[EASY TO USE] Available in 3 sizes, 45cm 55cm 65cm to meet your special needs. ( Please keep the ball away from woodwork, wooden furniture or painted walls becuase wood or painting are unfriendly to the exercise ball.) Product Description: Yoga ballMaterial: PVCColor: GreySize: 45*45m, 55*55cm, 65*65cmPackage contents: 1* yoga ball