Cascade 220 Superwash is great for all of your washable projects that need a worsted weight yarn, especially handy for babies and children's clothing as you can pop it into the washing machine on 40°.
This is a light worsted weight yarn, which is a little thinner than an aran weight.
Cascade 220 Superwash is 100% superwash wool which has a recommended needle size of 4-4.5mm, and 200m per 100g ball.