🎄【ANTI-BURST STRUCTURE】Resist up to 500kg. Made with thick and durable professional grade PVC materials. Safe, BPA-free and durable, and certificated by SGS safety test. Anti-burst system means PROIRON swiss ball only slowly deflate instead of bursting when exercise ball is pierced by sharp objects. 🎈【ANTI-SLIP SURFACE】PROIRON balance ball features an engraved and high tech anti-slip surface. Whether you’re using it as a gym ball, physioball, yoga ball, swiss ball, therapy ball, sitting ball, pregnancy ball or a general fitness ball, Its tactile lines blend with the smooth, hypoallergenic surface could provide comfortable, non-slip contact with your skin without the sticky feel. ⛄【VERSATILE USE】An birthing ball for many uses. Not only great for pilates, yoga, back and abdominal training and pregnancy gymnastics or the hundreds of low impact exercises but also can be used as an office ball chair to improve your posture & relieve back pain. 🎁【PERFECT GIFT】Comes in a premium and beautiful box, a perfect gift for your families, friends, and your love. According to height -- 55cm ball for 150-168cm; 65cm ball for 168-180cm; 75cm ball for 180-190cm approximately. 🎅【EPITOMIE OF PROMISES】 If you have any problem or concern please contact us back. We back it with a lifetime protection promise so you’ll never need to buy another!