Size: 5/6 Made of polyester, lightweight, quick dry, UPF 50+ which can block the harmful ultraviolet rays. The feel of the fabric is soft yet durable, won't stick to the body when wet. The boys swim suit is suitable for various beach activities, including swimming, surfing, running, or as a baby boy bathing suit at home etc. The mesh lining offers all the extra support you need, so that your boy can wear it comfortably.