Waloo Exercise Yoga Ball (55-75cm) Heavy Duty Stability Ball W/ Pump EXTRA THICK AND ANTI-BURST: one of the highest density exercise balls in the market. 2000 micrometers in thickness and can resist up to 2200 lbs. HIGH QUALITY MATERIAL AND ANTI-SLIP: Professional quality with non-toxic PVC material, free of BPA & heavy metals EASY TO INFLATE AND PERFECT PACKAGE: Save time and energy with the quick inflation pump included in the convenient box. VERSATILE USE: 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 office ball chair to improve your posture & relieve back pain.