The Polarmax Men's Comp-4 Crew is a technical fleece base layer designed to keep you comfortable in the coldest environments. The Comp-4 series is part of Polarmax's Warmest level of thermal underwear. Key features include moisture wicking, quick drying breathqble construction, anti-microbial technology, 4-way stretch for agility, a brushed inner face for next-to-skin comfort, flat seams and a no-bulk athletic fit. Made in the USA. Anthracite (dark Gray).