Sample is knit in two colorways of Noro Kureyon; one skein of each colorway is required. But the hat could easily be knit in a solid or handpainted yarn, or use oddballs and leftovers for a truly wild look! Category 4 yarns will work, including Universal Poems Silk, Brooklyn Tweed Loft, Quince & Co. Lark, Cascade 220, Plymouth Encore, Rowan Lima and others.