To strengthen, stretch and tone all major muscle groups. Enhance balance and coordination. Gently ridged surface. Slow-Air Release (Burst-Resistant). If punctured, deflates more slowly than the standard exercise ball. Includes am illustrated exercise guide, inflation guide, air pump, plug removal tool, and measuring tool to ensure proper inflation. 500-lb. static weight capacity. Latex-free. Recommended user height 5’1″ to 5’6″.