The Operator Grade Zip-Up Short-Sleeve Shirt combines the attributes of a traditional button-down shirt with the versatility of a zipper closure. A feature utilized for years by law enforcement officers, the discreet zipper closure allows rapid access to gear underneath your shirt while being hidden behind false buttons. The top and bottom buttons are also false, with hook & loop fastener behind them making the shirt even easier to open. A straight bottom hem with side vents give you the option of wearing the shirt out or tucked in. Two side-bellows chest pockets have hook & loop flap closures. There is also an oversized pen pocket on the left sleeve. The mesh lined vented bi-swing ba