Merino is well known for its breathability, comfort and antimicrobial properties. This 200-gram weight performance base layer will prove to be your new best friend. A functioning fly, anti-chafe flatlock seams, no center back seam, and a brushed elastic waistband ensure your base layers will be the last thing on your mind as you stalk grouse in the field or spend the day chasing steelhead. In black. 100% merino wool. Washable. Imported.