New to our innovative Intraknit(TM) line is the Men&';s Intraknit(TM) Thermal Merino Base Layer 1/4 Zip. This SmartwoolA(R) base layer is 3D-mapped for a near-custom fit and freedom of movement. Its engineered construction helps enhance your performance with a lighter weight and cleaner finish. If you&';re looking for base layer clothing for cold weather, this one uses Merino Sport yarn that combines the power and benefits of Merino wool with the durability and fast dry times of polyester-creating the ultimate performance-ready top for all of your high-energy activities. Features Fit: Slim Our slim fit is intended to follow the contours of the body Featuring Intraknit(TM) technology: Insulation, articulation, and ventilation are seamlessly integrated to help with movement and comfort Merino Sport yarn combines the moisture management, temperature regulation, and odor resistance of Merino with polyester Seamlessly knit mesh ventilation 3D mapping results in near custom fit and freedom of movement 8.25" (21 cm) center-front zipper Made in India: 53% Merino Wool, 44% Polyester, 3% Elastane. Exclusive of Decoration. SW002824 Care Machine Wash Cold Gentle Cycle Wash With Like Colors Do Not Bleach Dry Flat Cool Iron As Needed Do Not Iron Decoration Do Not Dry Clean