Color: Blue/pink/purple Material:PVC inflatable yoga ball:Yoga Mage Ball Diameter:34cm Package weight:0.948 kg Promote core stability, strengthens muscle tone, improves balance and body posture Help to reshape your body and improve balance and flexibility . Used as a wiggle seat to provide sensory input, and to help calm children that have a hard time sitting still. Ergonomic seating, relieve back pain and shoulder aches . Provide an unstable surface to exercise on, requiring you to use more muscles to stay balanced. Sitting on the cushion forces you to stand with good posture . Easy to use, adjusted by adding or releasing air. Package Contents:1* Yoga Mage Cushion Mat Only the above package content, other products are not included.