Our lightweight, long-lasting Men’s HH Durawool Crew Long Sleeve base layer top is designed for high-performance activities in warmer weather. When conditions are warm, our base layers are often more exposed, meaning they're more prone to abrasion and wear and tear. That’s why we made this long-sleeve crew neck shirt with a blend of ZQ-certified Merino wool and Cordura® for professional strength and durability. It features natural odor control, moisture-wicking and thermoregulating properties and also has raglan sleeves for freedom of movement and flatlock seams for extra comfort. See composition for more details on materials.