Keep warm, dry and comfortable during a cool morning run or a hike in the mountains with Columbia Sportswear's Trail Summit shirt. Crafted of moisture-wicking jersey, this zip neck top features Omni-Heat® technology that traps and retains body heat for cozy warmth. Can be worn alone or as a midlayer. Omni-Heat® thermal-reflective lining reflects and retains body heat for an average of 20% more warmth Omni-Wick® advanced evaporation technology moves and disperses moisture away from the body for rapid evaporation Soft, smooth polyester jersey Four-way stretch for mobility and comfort Zip neck Thumbhole cuffs Flatlock seams reduce chafing and irritation Reflective detail for visibility in low-light conditions Made in Sri Lanka US shipments only Columbia Sportswear Trail Summit Shirt - Long Sleeve (For Men) in Graphite Heather/Acid Yellow