Share the warmth this holiday season with a sustainable knit gift that will bring comfort and joy to hearts, hands, and Mother Earth alike. From upcycled boot cuffs to convertible flip-top mittens, here are 14 ultra-plush presents to ward off the winter chill. On a budget? We’ll show you how to turn an old or thrift-store sweater into a pair of snuggly sweater-socks—no sewing machine necessary.