Soothingly-soft, virgin Merino wool brings its temperature-regulating, stink-stopping super-powers to a tee that takes us comfortably through every adventure and misadventure—cool, dry and sweet-smelling. Ultra-fine Merino wool is our favorite, year-round, performance fiber. With European craftsmanship, we invest in it once and it goes the distance with us year-round. And at a super-fine 17.5 microns, it won’t itch... not ever. XS(2), S(4-6), M(8-10), L(12-14), XL(16).