SwimZip Little Boy Euro Short Swim Trunk Bottoms These are the cutest, fashion-forward little boy shortie Euro style boy swim trunks! Picture perfect for the pool, beach, and spray park! UPF 50+ UV sun protective fabric, blocking 98% of UVA and UVB cancer causing sun rays keeping sensitive little boy skin covered from the sun. Soft, chlorine resistant fabric. Adjustable tie waist.