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. 

Replacement Butyl Rubber Double End Bag Bladder available  Always have a spare for emergencies.

You MUST moisten the needle before inserting it in the bladder (Petroleum Jelly is best.) This will help prevent small tears in the inflation valve and deflation of your bag.