The shirts feature two narrow pockets on the left sleeve - handy for stowing a pen or holding your sunglasses, plus a button-down, reinforced collar and triple-stitching in all high-stress areas. A cape-back with wicking mesh keeps you cool. The 5.11 Tactical shirt is offered in long- and short-sleeve versions, 5.4-oz. cotton canvas or 4.7-oz. nylon ripstop.