Bernat-Pipsqueak Stripes. Bernat Pipsqueak Stripes is a luxuriously soft self-striping yarn that knits and crochets up quickly. Made from 100% polyester, this yarn is incredibly soft on the skin and is a great option for blankets, clothing and accessory projects. Featuring a fun range of shades, this yarn is easy to care for and is great for kids and babies. Weight category: 5. Content: 100% polyester. Putup: 9.8oz/280g, 284yd/260m. Gauge: 11sx16r = 4in/10cm on size US9/5.5mm knitting needles. Suggested crochet hook size USL9/5.5mm crochet hook. Dyelotted: we try but are not always able to match dyelots. Care: machine wash and dry. Comes in a variety of colors. Each sold separately. Imported.