This vintage Polo Ralph Lauren sweater is perfect for your little prep The tight-knit 100% cotton fabric is striped in blue and red, with a high neck and long sleeves for cozy warmth. The 1/4 zip and preppy theme add a stylish touch. This sweater is a size L and is perfect for boys' clothing sizes 4 and up. The brand is well-known for its quality and style, and this sweater is no exception. Get your little one ready for colder weather with this classic pullover.