The Men's Smartwool Intraknit Merino 250 Thermal 1/4 Zip is everything you could wish for in a performance oriented layering piece. The 1/4 offers top-notch moisture management, insulation, thermoregulation and odor control thanks to the Merino yarn. Insulating terry loops work with mesh ventilation zones create unparalleled breathability in the Intraknit Merino 250 Thermal 1/4 Zip. 100% Merino Wool - Moisture Management, Insulation, Thermoregulation, Odor Control, Engineered Construction - Knit Structures Enhance Performance, Sophisticated Finish, Slim Fit, Insulating Terry Loops + Mesh Ventilation in Gender Specific Zones - Balance Warmth + Breathability, 3D Mapping - Near Custom Fit, Freedom of Movement, Ribbed Elbows - Added Durability, Knit-In Reflective Elements - Enhance Visibility in Low Light Conditions, 8.25in. Center Front Zipper, Fit: Tight, Warranty: One Year, Wind Protection: No, Material: Wool, Weight: Light, Type: Top, Wicking Properties: Yes, Water Resistant: No, Recommended Use: Snow, Antimicrobial: No, Anti Odor: Yes, Quick Drying: No, Moisture Wicking: Yes, Model Year: 2022, Product ID: 619313, Model Number: SW016144001-M, GTIN: 0193392162286