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