Duckworth Vapor Henley - Men's Crafted from high-performance Vapor Wool fabric Heathered tri-blend fabric is lightweight, ultra fast drying, and anti-microbial Summer weight wool fabric has all natural stretch with no added lycra Conductive Re-Vaporation keeps you cool during exercise Materials: 38% Helle Rambouillet Merino wool / 50% Recycled Polyester / 12% Modal