Lightweight merino rib-knit baselayer top. Like Sriracha or single origin coffee beans, the Woolies 1 Crew is an indispensable life improver. Pull it on for chilly morning runs, laps in the backcountry, or under your button down at the always drafty office break room. Woolies can do it all. Made of 100% soft, breathable, odor resistant merino, this shirt is a base layer that's anything but base. Material: Wool.