Rest your eyes (and body) on Lunya's 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 an effortlessly polished look. Featuring honeycomb and rib detailing and OEKO-TEX® certified (read: no harmful chemicals).