Keep loved ones’ toes toasty with soft, snug booties. Roving, also known as unspun, wool gives these pairs their dotted (or “hearted”) motif and fleecy interior. You work it in with a technique called thrumming, which originated in the chilly climes of Newfoundland. It involves adding in a piece of the fluffier wool every few stitches. You don’t need any special tools; just whip out some circular needles to create the curved shapes.