Shop Boys's at RalphLauren.com, the Official Site of Ralph Lauren. Rib-Knit Merino-Blend Hat - Crafted from an ultra-soft blend of merino wool and cotton, this skull cap features a classic rib-knit pattern and our signature embroidered pony. Allover rib-knit pattern. Our signature embroidered pony accents the front hem. 55% extra-fine merino wool. 45% cotton. Machine washable. Imported.