Made of environmentally friendly PVC, the exercise half ball is durable and safe to use. The stability ball is compact and lightweight for you to conveniently carry it to the gym, park, or beach to enjoy workout. The workout balance trainer is a necessary equipemnt to exercise at home or office. Ideal for lower-ab crunch, plank, triceps dip and more to increase core strength, stability and flexibility. This half stability ball is easy to clean and store after use. You can deflaten it for a convenient carry and storage at home, office or gym. The half balance ball is light weight but hold up to large capacity 440lbs/200kg. Good choice for women and teenagers. Specification: Material: PVC + ABS Diameter:46cm Maximum Bearing Capacity200kg/440lbs Note: Due to the difference between different monitors,the picture may not reflect the actual color of the item Please allow 0.1-1cm differs due to manual measurement,thanks