Shop Unisex's at RalphLauren.com, the Official Site of Ralph Lauren. Big Pony Cotton Polo Dress - This soft cotton mesh dress features a polo shirt-inspired silhouette and our signature embroidered Big Pony. Ribbed polo collar. Four-button placket. Long sleeves with sewn cuffs. Ruffled hem. Our signature embroidered Big Pony accents the left chest. 100% cotton. Machine washable. Imported.