evo.com | Smartwool Long Underwear Tops > The Smartwool Intraknit Thermal Merino Base Layer Hoodie has a high-tech blend of merino wool and polyester, designed for your most active pursuits. Sewn with a sleek, helmet-compatible hood and 3D body-mapped fabric, it is designed to move with your body, so push it! Intraknit(TM) Technology Insulation, articulation, and ventilation are seamlessly integrated to help with movement and comfort during high-intensity activities 3D Mapping Results In Near Custom Fit and Freedom of Movement Slim Fit Slim fit is intended to follow the contours of the body Mesh Ventilation 78% Wool-Merino / 18% Polyester / 3% Elastane / 1% Polyamide | Women's Smartwool Intraknit Thermal Base Layer Hoodie 2026 - X-Small Brown | Wool/Elastane/Polyester