KNITWHITS-Elfin Booties Kit. Elfin Boots are knit on single point needles with 100% wool yarn. Final sizing is determined in felting. Mitered squares work up quickly with just one color at a time with minimal sewing: one short seam! Kit includes yarn and patterns in four sizes from infant to Women's Medium. Required skills: Knit and Purl. Suggested needles size 10. Made in USA.