47 Brand Boston Red Sox Hat Strap Back Navy Hitch Rope Mesh Back MLB Baseball. The product is a 47 Brand Boston Red Sox hat in navy blue with a mesh back. It features a strap back closure for a comfortable fit. This officially licensed MLB baseball cap is perfect for any Boston Red Sox fan looking to show their team pride while staying shaded from the sun. The hat is one size fits all, making it a versatile accessory for any baseball enthusiast.