Inflatable ABS Exercise Ball – The CanDo Inflatable ABS Ball is ideal for home, gym, prenatal and therapy exercises. This durable ball is also a great alternative to classroom or desk seating. Use it to improve balance, strength and coordination. Quality Materials – Our exercise ball is made from durable PVC vinyl that’s specially designed to release air slowly if a sharp object were to puncture the ball, like a pencil. Ball supports users up to 600 lbs.; slow release effective up to 280 lbs. Non-Slip Surface – Maintain stability during workouts! The exercise ball is made with a non-slip material that features ribbing for added security. Confidently sit on the ball, rest your back on the ball, or grip the ball with your hands or feet. Use Anywhere – Incorporate the exercise ball into home or gym workouts to build core strength. Utilize the ball in physical therapy and birthing classes to support balance. Substitute it as a desk chair at work or school to promote active sitting. Sold In 6 Sizes – Choose from six sizes: yellow, 45 cm (18 in.); orange, 55 cm (22 in.); green, 65 cm (26 in.); red, 75 cm (30 in.); blue, 85 cm (34 in.); and red, 105 cm (42 in.). Select your size based on user height. Air pump sold separately.