The Hanna Andersson rash Guards in size 100/US 4 are perfect for young boys looking to stay safe while enjoying recreational activities in the water. Made from a blend of nylon and spandex, these blue rash guards are machine washable for easy care. Hanna Andersson is known for their high-quality and durable clothing, making these rash guards a great choice for active kids. Excellent condition- no signs of wear.