Stay warm while looking cool with Smartwool’s Intraknit Merino 200 Crew. This lightweight, super-moveable top will keep you warm and dry in all cold-weather conditions. Merino Sport yarn combines classic Merino wool softness with fast-drying polyester for a durable top for all high-intensity activities. Specialized 3D mapping provides gender-specific construction with mesh ventilation seamlessly knit into the minimalist design for maximum breathability, movement and comfort. Tackle any adventure in Smartwool’s super lightweight base layer.