ANTI BURST AND SLIP RESISTANT: A work out ball with sturdy PVC to withstand the most punishing workouts. This heavy duty stability ball is rated beyond 330 lbs of weight; safe as a pregnancy ball or birthing ball. QUALITY AND DURABILITY: Our exercise ball large is made from soft low-odor material free from common harmful toxic additives; a must for safety as a birth ball. Available in 5 sizes: 45 cm, 55 cm, 65 cm, 75 cm and an extra big ball at 85 cm. INCLUDES EXERCISES, QUICK PUMP, PLUGS AND REMOVER: This excersing ball is inflated in minutes with included exercise ball pump. Get focused on your thighs, abs, or recovery when using a gym ball. FITNESS BALL RECOMMENDED BY PHYSICAL THERAPISTS TO INCREASE CORE STRENGTH AND FLEXIBILITY: Use a small exercise ball or yoga ball small to focus on your lower back. A Swiss ball is great for active sitting as an exercise ball chair for office or seating in a classroom. VERSATILE PHYSIO BALL: Use as a yoga ball office chair, a large exercise ball, or a pregnancy yoga ball or labor ball. A must-have fitball for focused core strengthening.