This updated version of our popular Quantum TDU FD Long Sleeve Shirt features a traditional two piece fold-down collar. The Quantum TDU FD Long Sleeve Shirt is made with the kind of fabric engineered for high-level performance, where the smallest detail can make a world of difference. We built the body with FlexLite ripstop fabric with Teflon to give you freedom of movement and protection from water, oil, grease and dirt. The shoulders are Fast-Tac fabric for flexibility and the rear panel is abrasion-resistant jersey for stretch and next-to-skin comfort.