This pattern uses worsted?aran weight yarn for the adult size and dk/light worsted for the children’s size.
Although if you wish to have extra warmth feel free to use a chunky/bulky weight for adults or aran/worsted for children’s but keep the hook size the same to ensure the correct size.

This bandanna cowl fits snuggly under your jacket or can be worn on top of a jumper, pull the cowl up to keep your nose toasty warm for when the bitter wind bites.