The recycled polyester fabric gives this rashguard outstanding durability to see you through season after season, And since it's chlorine resistant too, you don't have to worry about it breaking down or stretching out after swimming in in the pool, The fibers stay strong and the fit stays snug, Plus, built-in UPF 50 sun protection gives you the ideal barrier against burns no matter if you're just going out to get wet or it's a 6-hour marathon session.