HIGH QUALITY MATERIALS: The whole body of air roller is made of PVC,which is waterproof and wear resistant,and the side ses of the roller are reinforced,which is very good in airtightn and durability.The roller is made of high quality material and no odor WIDE APPLICAT: Air is suitable for beginners and profal athletes,you can use the to do yoga;gymnastics workout;tumbling and other workouts.The for a variety of daily life scenarios,avoiding contact with objects during use EASY TO USE: Each air roller es with 1xinstruct manual and 1x repair material,choose the roller with air pump you will t a 600 W air pump,using the air pump can be quily iated and deflated in 1 minute ROLLERS AND GYMNASTICS MATS: Jumps,tumbles and other gymnastic movements are performed on gymnastics mats,and the use of rollers and mats in conjunct with each other can better avoid injuries : Our friendly te is always here to help,and you can leave a ma anytime.