Keep warm, dry, and comfortable in cold weather conditions with the Columbia Trail Summit Long-Sleeve Shirt. Ultra-durable 87% polyester, 13% elastane fabric is bolstered with Omni-Wick technology, which pulls moisture away from the body so sweat can evaporate quickly. The breathable Omni-Heat Thermal Reflective lining utilizes little silver dots to reflect and retain body heat and help regulate your body temperature. Flatlock seam construction helps reduce chafing for long-wearing comfort. The low-profile, crew-neck collar ensures a snug, but not-too-tight fit. Reflective detail increases safety and visibility in low-light conditions. Modern Classic fit. Imported.