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Enhancing traction with larger tread: New design of larger tread offers an easy and tight grip on the exercise ball. Also, wide glossy groove allows water to slide through quickly, so no longer afraid of slips caused by sweat from sweaty hands and intense
Sand innards makes it less bouncy: This version of weighted balls is great for slamming into the ground, overhead throws, “Ground to Shoulder” and other exercises as the sand shifting keeps the ball stay in one place once it touches the surface.