Machine Knit Acrylic Yarn Machine Wash The recipe for this winter winner? Comfort, warmth, and a dash of retro style. Your young adventurer is going to party like it's 1989 in this cozy, retro styled hat. Dig up your old winter gear and maybe you two can match while you hike and play in the snow. Your old beanie might not be as comfy as the Winter Thyme's quality acrylic fabric and cozy double-layer cuff, but we can bet it looks just as fresh.