The Merino Boxer in Heather Grey from Taylor Stitch. 5-oz. 95% superfine mercerized Merino, 5% Lycra. 18.5 micron. The mercerization process gives merino amazing softness, increases the strength of fabric and makes the Merino machine-washable. Merino wool provides excellent moisture management; transferring moisture away from your body to keep cool and dry, effective temperature regulation, odor control and stain resistant. Flat lock construction so the seams lay flat against your skin. Athletic fit. Elastic waistband. Fly opening. Machine wash cold, lay flat to dry. Made in Turkey.