Perfectly Safe Design: The inflatable bumper balls were made with non-toxic 0.3MM PVC for the whole body. They also had a thicker connecting piece, a safe air valve, and secure handles to make sure that kids were completely safe while they played. Portable AND Lightweight: Using the air valve, it only takes a few minutes to blow up or deflate this human hamster ball, and it's very light to carry around. Outdoor Activity Essential: -A good toy for kids or families to play at a BBQ, party, or picnic. This is a great way to get some outdoor exercise while having a lot of fun. Dimensions and Recommendations: The external diameter is 36"/90cm. Suggested player height is 48"-75" and player weight is 110-330 lbs, which is ideal for children aged 3-15. Do not over-inflate: Recommended for children 6 years and older, adult supervision is required. Helmets and appropriate safety gear are recommended.