WORKS HARDER THAN YOU DO; SMELLS BETTER TOO! The Cozy Dell Long Sleeve Shirt is built with Engineered Merino - superfine merino wool wrapped with recycled polyester filament fiber, not just blended in, so it holds up through sustained effort, shifting temps, and repetitive use the way standard Merino can&';t. It moves moisture before it becomes a problem, regulates heat without overthinking it, and keeps odor in check so you&';re not reaching for a clean one every day. Durable enough for real use, soft enough you&';ll stop noticing it&';s there. We&';ve had two decades to get this right. ForgeLine has been building high-performance wool next-to-skin baselayers for U.S. Special Operations Forces since day one - long enough to know exactly where standard Merino fails and exactly what it takes to make it better. Engineered Merino is what that experience looks like today. Style Number: 1405002