Long sleeve swimsuits have tons of perks: - They have built-in sun protection (especially if they're made out of a fabric that's UPF 50+). - They're an easy one-and-done choice (forget digging through drawers to find your matching sun shirt cover-up). - When you're headed out for water activities, these long sleeved one-piece swimsuits are just a bit warmer in chilly water. (Every little bit counts!)