MULTIPURPOSE EXERCISE BALL: Enhance your work out routines, use as an alternative to a desk chair to improve posture and balance, or use as a pregnancy birthing ball to relieve discomfort. Ideal stability for yoga, Pilates, or stretch/strength training. ERGONOMIC DESIGN: Our anti-burst exercise ball helps to fix posture and strengthen your core, back, and muscles while accomplishing tasks at home, the office, or the gym. WHAT'S INCLUDED: Extra thick anti-slip yoga ball, hand pump, a plug puller, and two plugs. The base will increase the number of possible workouts and allow use of resistance bands. SAFETY: DO NOT use Swiss ball while it is in or on stability ball base on a slippery surface, such as wooden floors or tiles. Take extra precaution while using this item as a pregnancy ball for birthing exercises. SPORT TYPE & SIZING: The Luna Exercise Ball can be used for weightlifting, stretching, meditating, birthing or as a balancing work chair. For proper sizing, reference the size chart image.