Features of the Smartwool Men's Intraknit Merino 200 1/2 Zip Hoodie Engineered construction Uses knit structures to enhance Performance with lighter weights and cleaner finish Mesh ventilation seamlessly knit in gender-specific zones designed to keep the body dry and comfortable 3D Mapping results in near custom Fit and freedom of movement while ribbed elbows provide added durability Fabric Details 53% Merino Wool, 45% Polyester, 2% Elastane