The Kanu Surf Boys' Echo Quick Dry UPF 50+ Beach Swim Trunk in Victor Navy/Royal, size 4T, features a stylish striped pattern and is made of 100% polyester material. This beach swim trunk is designed with quick dry technology and offers UPF 50+ protection, making it perfect for surfing and other water activities. The trunks are machine washable and come in a vibrant blue color, embodying a royal and beach theme that is sure to make any boy feel like a prince by the sea.