Yoga exercise balls consist of an anti-burst PVC plastic. This creates pliability and is for the safest, most functional use under normal sitting and workout conditions. Basic Information 1.Material: PVC 2.Color: any color 3.Size: 45cm, 55cm, 65cm, 75cm, 85cm, 95cm 4.Package: 1 piece/color box with pump and poster chart 5.Accessories: measuring tape, plug, nozzle Features （1）CE, 16P free, PAHs free, and EN71-3 / 19 heavy metal certification （2）environment-friendly, anti-burst, big sticker, non-longitude （3）increase flexibility, improve coordination and develop strength （4）tested by 1100lbs weight (anti-burst material) and has SGS certification （5）tested by 660lbs weight (regular material) and has SGS certification （6）mini size for kids （7）in different sizes, colors and designs