The only field tested and authorized combat shirt allowed for troops outside the wire. Massif’s ACS is the new standard for hot-weather combat gear. A progressive design incorporates feedback from thousands of soldiers in some of the worlds most unforgiving environments. Our innovative FR fabrics are lightweight, breathable, and highly wicking. With four-way stretch, a performance fit, and uncompromising FR construction, the ACS is engineered for FR protection and exceptional comfort under armor. Features Full flame-resistant construction with proprietary Massif fabrics Lightweight, ultra-breathable and wicking torso fabric Durable, breathable sleeve fabric 4-way-stretch fabrics Flat seam construction minimizes chafing Low-profile, zippered shoulder pockets Concealable IR tab Lightweight elbow pads with abrasion-resistant Super Fabric® technology Pen pocket on left forearm Seamless side-panel construction increases comfort under armor Velcro loop for name, rank, flag, and unit tape Wrist cuffs adjust for a customizable fit Machine washable. Excellent-Condition.