product description 1. Multipurpose: Can be used for stretching, yoga, Pilates, gym or office. Our fitness ball is suitable for back pain relief during pregnancy and helps improve your posture to avoid long-term back pain because it is more than just a fitness ball. 2. EASY SETUP: The balance ball chair is quick to set up and has an air pump to help you easily inflate the ball within a minute. Designed to give you a high-intensity workout while reducing bulking intensity. 3. Fun group workouts: Fun group workouts are available wherever you are. You can replace small talk time with fun group exercises at home or in the office. 4. Explosion-proof and safe to deflate - Our fitness ball is safe with honeycomb structure, so even if you accidentally pierce the yoga ball, you won't immediately fall to the ground. This construction means that the air is released little by little, so this burst resistant and slow deflation design makes the stability ball much safer. 5. Sitting posture correction and massage: This inflatable balance ball can be effectively used as a multifunctional office ball chair. It constantly reminds you of good sitting posture as your various body parts actively make subtle adjustments to maintain balance, allowing you to sit upright automatically and increasing overall blood circulation. The soft PVC surface creates a massaging effect that relieves your fatigue while working at your desk.