Iconic Big Pony Polo Boy Light blue by Ralph Lauren Kids Spring Summer Collection. From its meticulous construction to its cotton mesh fabric, which only gets better with wear, Ralph Lauren's Polo shirt has been an icon of American style since 1972. This Slim Fit version is finished with a "3" patch, just like those worn by a polo team's strongest player. 100% Cotton, machine washable, slim fit, signature embroidered Big Pony at the left chest, ribbed polo collar, two-button placket, short sleeves with ribbed armbands, twill "3" patch at the right sleeve.