SOYSILK® brand fiber is made from the byproducts of tofu manufacturing. The process is petrochemical-free and completely natural. SOYSILK® yarn is: soft, smooth, and machine washable. renewable and biodegradable. absorbs moisture like cotton 100% SOYSILK® brand fiber 5 sts and 8 rows = 1" needles: US 6 (4.0mm) 240yds / 100g ball machine wash, air dry