A hard-wearing wardrobe staple, the 1/3 Zip is a foundational piece to the lineup. Not too slim not too baggy through the body, this registered garment is built with our original 9.5 oz. Merino Dual Cloth - a 100% merino wool face with a cotton blend reverse and finished with a heavy gauge blackened brass RIRI zipper. Knit, cut, and sewn in the U.S.A. For trim fit go true to size or for relaxed fit size up.