EUC, worn twice. Extremely comfy and stylish. Matching joggers in my closet. From their site: Rest your eyes (and body) on the Cozy Cotton Silk Collared Half Zip. A luxe blend of Washable Silk and Organic Cotton, it’s naturally thermoregulating to take you from season to season. Designed with a fold-down oversized collar that can be zipped up or down for custom comfort, the ribbed trim at cuffs and hem complete a an effortlessly polished look. Featuring honeycomb and rib detailing and OEKO-TEX® certified (read: no harmful chemicals).