Polo Ralph Lauren Stretch Cotton Classic Fit Trunks - 3 Pack (NWTRP3). The Polo Ralph Lauren Stretch Cotton Classic Fit Trunks - 3 Pack NWTRP3 offers the same quality and good looks you've come to expect from this label. Polo Ralph Lauren's Stretch Cotton Classic Fit Trunks - 3 Pack is made of cotton/polyester/spandex.