UNIVERSAL YARN Clean Cotton is a medium-weight yarn for knitters and crocheters who want a reclaimed-fiber option for home and accessory projects. In Yarrow, each 75 g ball blends 85% recycled cotton with 15% recycled polyester and works to about 18 sts over 10 cm (4 in) in stockinette. The breathable construction adds durability and a softly textured hand, making it comfortable in everyday stitches.