We might call them wool leggings, we might call them a base layer - same thing. The Icebreaker Womens Oasis 200 Leggings 2020 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 legs' number one base layer, using the power of merino in the form of wool leggings to keep you warm—but not too warm, at a 200gm weight.