Start by making your pattern. Wandy lays out an old hoodie on some pattern paper and traces around it, leaving half an inch of seam allowance on the sides, and a full inch on the bottom for the hem.

You don’t need to carry your mask with you, you can just zip the hood—made of filtering material—up tight around your face. If you’re tired of wearing a DIY mask, a new hoodie offers another option: a ...