Smartwool Granite Creek Crew - Men's wool Men's sizes: Small = 29-31" waist 36-38" chest. Medium = 32-34" waist 39-41" chest. Large = 35-37" waist 42-44" chest. X-Large = 38-40" waist 45-48" chest. XX-Large = 41-44" waist 49-51" chest. 100% merino wool, waffle knit body with tubular cuffs and bottom hem. Hand wash cool, lay flat to dry. Rib collar with interior contrast stripe and color tipping at cuffs. Back yoke construction detail. Relaxed fit.