The New Men's Old Navy California Built In Flex UPF 40 Swim Trunk in size 40 features a stylish striped pattern in multicolor, making it a standout piece for your swimwear collection. Made from a comfortable blend of polyester and spandex, these machine washable swim trunks offer built-in flex for added mobility and comfort while in the water. Designed for various performance activities like lifeguarding, surfing, and recreational swimming, these trunks are perfect for any water enthusiast looking for both style and functionality in their swimwear.