Knit crewneck sweater in RWS-certified stretch wool with stocking stitch featuring a ribbed motif at the collar, shoulders, armholes, and sides. Gauge 12. Crewneck knit in RWS-certified stretch wool. Stocking stitch. Gauge 12. The Responsible Wool Standard (RWS) describes and certifies animal welfare and land management practices in wool production and tracks the certified material from farm to final product.