The MANTRA SPORTS Exercise Ball is a gym-grade stability ball made for real daily use—yoga, Pilates, fitness workouts, core training, balance exercises, stretching, mobility work, and physical therapy. It's also a popular choice as a pregnancy ball, birthing ball, and labor ball for gentle movement, pelvic mobility, and comfort at home. Whether you're building strength, improving posture, or adding variety to your routine, this workout ball helps you train with more control and confidence. Built to support up to 330 lbs, this anti-burst exercise ball is designed to resist sudden popping and release air more slowly if punctured. The anti-slip textured finish helps reduce sliding on the floor and improves grip against your body—use it for ab exercises, back support, stability training, flexibility work, and rehab movements. Many customers also use it as an exercise ball chair, desk ball, or sitting ball for active sitting at work to engage the core and support posture during long desk hours. This versatile gym ball / physio ball / therapy ball works great for a home gym setup, studio workouts, recovery routines, and pregnancy use. It's ideal for anyone looking for an inflatable exercise ball that can handle strength and stability work while staying comfortable for stretching and sitting. Every set includes an air pump, plugs, and easy instructions so you can set up quickly and get started right away. (See listing images for the exercise ball size guide and the step-by-step inflation guide.)