With Premier Yarn Sweet Roll Vivid Yarn, your knit and crochet projects are sure to pop. This #4 medium weight, 100% acrylic yarn comes in bright colors and creates a self-striping effect as you work. Its also Standard 100 certified by OEKO-TEX, so it can be safely worn and used by babies and those with sensitive skin. The yarn is dye lotted and machine washable. Each 3.5 oz (100 g) cake contains (160 m) of yarn. - Premier Yarn Sweet Roll Vivid Yarn - It's Electric.