QUALITY MATERIAL: The whole body of air roller is made of PVC,which is waterproof and wear-resistant,and the side seams of the roller are reinforced,which is very good in airtightness and durability.The roller is made of high quality material and no odor Inflatable Gymnastics Air Barrel Tumbling,Air barrel is suitable for beginners and professional athletes, you can use the barrel to do yoga, gymnastics workout, tumbling and other workouts. The air barrel can be used on the gym floor, backyard, indoor and outdoor to meet your daily needs, avoid touching sharp objects during use.