The functional benefits of lightweight merino wool are highlighted when you go all the way. Nothing keeps you more comfortable than all-natural, chemical free wool. Having wool against your skin that's dry, soft, and breathable is paramount to keeping you cool where it counts. The fitted brief has a brushed waistband, functional fly and is made from our patented Vapor Wool blend. The Merino wool is all Montana grown and briefs 100% made in the USA.