This rib knit is soft with a stretch across the grain of the fabric. The cotton part is re-generated from cloth and leftover yarns and the polyester part is recycled from plastic bottles. Recycled polyester, also known as rPET, is obtained by crushing and melting existing plastic and spinning it again into a new polyester fiber. It is perfect for creating tank tops, loungewear, collars, cuffs, waistbands and form fitting garments.