Harness speed, improve reaction time and perfect the type of combination punching that the double-end bag was made for with exclusive Gyro Balance technology! Designed to deliver the perfect rebound punch-for-punch. Engineered with precision and Genuine Leather construction with double-stitched, welted seams for long-lasting performance. Traditional lace closure system for easy access. Includes a butyl rubber pro bladder with special internal balancing for maximum results, and industrial rubber top and bottom attachment straps with S-hooks.