NWT Everlane The Ultrafine Merino Ribbed Polo in black. Size small. The Ultrafine Merino Ribbed Polo is made from—you guessed it, 100% RWS-certified merino wool. With a form-fitting silhouette, and ultra-soft fabric, it features a ribbed polo, a fallback shoulder, and jersey detailing in the underarm. The Responsible Wool Standard (RWS) sets requirements for third-party certification to ensure that wool comes from farms that manage their land with a progressive approach, practice holistic respect for the sheep, and follow the Five Freedoms of animal welfare. The standard also maintains a strong chain of custody for certified materials as they move through the supply chain to guarantee visibility, protect soil health, biodiversity, and native species on all RWS farms, as well as adhere to strict social welfare practices for the health and safety of workers. Pit to pit measures 16” Length 22.5”