Fit and Design: Slim fit is intended to follow the contours of the body Crewneck Long sleeves Engineered construction uses knit structures to enhance performance with lighter weights and cleaner finish 3D mapping results in near custom fit and freedom of movement while ribbed elbows provide added durability Technology: Merino Sport yarn combines the power of Merino with the durability and fast dry times of polyester Mesh ventilation seamlessly knit in gender-specific zones designed to keep the body dry and comfortable Additional Details: Garment weight: 180g (6.35oz)