Shop Unisex's at RalphLauren.com, the Official Site of Ralph Lauren. Cotton Polo Shirt - The classic short-sleeved Cotton Polo Shirt is designed with a hint of stretch and our signature embroidered pony. Ribbed polo collar. Four-button placket. Short sleeves with ribbed armbands. Uneven vented hem. Our signature embroidered pony accents the left chest. 98% cotton; 2% elastane. Machine washable. Imported.