PRO MAX Exercise Ball by SmarterLife – Professional Grade Extra Thick Yoga... $14.97 – $22.97 NEW SHOCK RING TECHNOLOGY FOR MAXIMUM SAFETY YOU CAN LEAN ON: Our new PRO MAX series exercise ball shock ring surface pattern provides an ultra-high anti-burst rating of 2500 lbs. and retains its shape for years. Our stability ball doesn’t pop like a balloon when punctured by sharp objects which is what happens with lower-rated balls. Instead, it slowly deflates and protects you from injury during vigorous exercise or while using it as a desk chair. EVEN, ALL-AROUND THICKNESS PREVENTS ROLLING & RETAINS SHAPE BETTER THROUGH TIME: The PRO MAX series introduces a uniform, thicker casing to create a greater resistance to punctures and to prevent air from seeping through the surface. It makes a perfect balance ball with its sturdy 2.5 mm PVC casing that stretches evenly across the ball surface, maintaining its shape longer and preventing it from rolling away. ALL-IN-ONE HOME GYM EQUIPMENT FOR VARIETY OF FUNCTIONS: Use our PRO MAX Series exercise balls for a wide array of active exercises such as yoga, Pilates or CrossFit to tone muscles, increase cardio endurance, build strength and control weight. The versatility of our therapy ball stretches beyond exercise into activities such as correcting posture, ab development, play therapy, sitting at a desk, labor support during pregnancy and birthing.