Shop Baby's at RalphLauren.com, the Official Site of Ralph Lauren. Cotton Long-Sleeved Polo Shirt - This classic long-sleeved polo shirt is crafted from a stretch-cotton blend and features pretty shirring at the shoulders and our signature embroidered pony. Polo collar. Three-button placket. Long sleeves with sewn cuffs. Shirring at each shoulder. Even vented hem. Our signature embroidered pony accents the left chest. 98% cotton. 2% elastane. Machine washable. Imported.