Best short sleeve rash guards for toddlers: Uzzi Amphibious Gear specializes in sun protective shirts. We manufacture the best lightweight rash guards for toddlers with UPF50. Our toddler’s rash guards are made of polyester and spandex providing ultimate comfort and stretch. If you are looking for sun protective shirt for toddlers to swim in, Uzzi has you covered! Check out our light blue short sleeve rash guards with UPF50. This short sleeve rash guard #4700TL will be the best choice for you.