Shop Baby's at RalphLauren.com, the Official Site of Ralph Lauren. Big Pony Long-Sleeved Polo - This classic polo shirt is crafted from soft cotton mesh and features our signature embroidered Big Pony. Ribbed polo collar. Four button placket. Long sleeves with sewn cuffs. Even vented hem. Our signature embroidered Big Pony accents the left chest. 100% cotton. Machine washable. Imported.