Engineered to be the ultimate combat shirt, the Vertx 37.5 Combat Shirt retains and expels heat in relation to the body's optimal 37.5-degree Celsius humidity temperature. Ideal for wear under tactical vests, chest harnesses and body armor, this shirt is chemical-free, ultra-durable and combines quick-drying and moisture-wicking technologies. It features dual bicep pockets with hook and loop closures and an anti-chafe suede collar suited for comfortably wearing with armor or a sling pack. The quarter zip front makes adapting to varying climates quick and easy, and the traditional military style cuffs allow for a customizable fit. The elbows are double-reinforced and double-articulated for durability and maneuverability, ensuring a full range of motion that will not slow you down in the field. Vertx has designed this shirt to be as rugged and hardworking as the modern tactical operator.