From：Join High (Xiamen) Fiber Tech Co., LTD Release time：2018-07-11
Working with worsted-weight yarn
Worsted-weight yarn falls into the medium-weight category as defined by the Craft Yarn Council of America. Sometimes when shopping for worsted-weight yarn, you’ll find a symbol with the number 4 on the label that matches the Craft Yarn Council’s weight system symbol.
There are no limitations to what type of worsted-weight yarn you can knit with. You can find worsted-weight synthetic yarn, like Cascade Cherub yarn that’s made from nylon and acrylic.
I love using worsted-weight yarn when I’m testing a new stitch or learning a new technique because the weight makes it easy to work with while also showing me the stitch definition. Use a lighter-colored worsted-weight yarn if you’re trying something new so that if you make a mistake, you’ll be able to easily see it.
Most worsted-weight yarns, like any other yarn weight, can easily be substituted for another worsted-weight yarn. And because worsted-weight is such a popular yarn, you’ll have plenty of substitution options to choose from!