Cliff Keen combines comfort, durability and athletic construction in our remarkable U126MXS shirt. Say goodbye to heavy, sweat-soaked shirts and tucking in bulky layers. You won't find a tougher shirt on any diamond - without the weight and bulk of former uniform shirts. It's this unique blend of quality, performance, and lightweight construction that makes our Ultimate Diamond Shirts the best offering available. tested by some of the world's best professional umpires, the U126MXS will surpass your expectations.