Shop Baby's at RalphLauren.com, the Official Site of Ralph Lauren. Big Pony Cotton Polo Shirt - This soft cotton mesh polo shirt features our signature embroidered Big Pony. Ribbed polo collar. Three-button placket. Puffed short sleeves with ribbed armbands. "3" patch applied at the right sleeve. Even vented hem. Our signature embroidered Big Pony accents the left chest. 100% cotton. Machine washable. Imported.