Sirdar No1 is an unbelievably soft double knitting crepe yarn. This incredible yarn has an acrylic nylon blend and comes in an amazing palette of 18 shades. The No1 colour palette covers every aspect of the colour spectrum, meaning there is something for every taste and need. Sirdar No1 is a double knitting yarn that is perfect for a whole host of knit and crochet projects, including adults, children, baby and the home, we have a great range of patterns with designs for each of these. Sirdar No1 is a standard dk tension and is machine washable.