Welcome to Green Mountain Spinnery Natural Fiber Yarn – A Worker-Owned Cooperative in Putney, Vermont. Since our founding thirty years ago we have been designing and producing richly colored, must-touch classic and contemporary yarns. To this day, our goals remain unchanged: to create yarns of the highest quality, to help sustain regional sheep farming, and to develop environmentally sound ways to process natural fibers. All the fibers we use — alpaca, mohair, wool, and organic cotton — are grown in the United States. We make every effort to purchase directly from individual growers. Our 100% wool yarns are spun entirely from New England fleece. Unlike most commercial mills, The Green Mountain Spinnery uses no chemicals to bleach, moth-proof or shrink-proof yarns.