nylon UPF 50+ (Some brands stop at UPF 30+) Chlorine and fade resistant Guaranteed to last all season (Many aren"t) Machine washable (Some brands must be hand washed)Girls Swim DiaperOur little girls" swim diapers are cuter, neater, and greener than icky, bulky disposable diapers! Babies love them "cuz they"re slim and comfortable; you"ll love them, they"re easy and economical. Love the idea of these green diapers because they won"t clog landfills! Our reusable swim diapers provide UPF 50+ protection against UVA and UVB rays. Machine wash. Imported.