We might call them wool leggings. You might call them a base layer. Same thing: these mens leggings are primed for any cool weather outdoor adventure. And when we say cool, we mean happily slogging across a glaciered terrain in sub-zero temps. The Oasis Leggings are your leg's number one base layer, using the power of merino in the form of wool leggings to keep you warm—but not too warm.