Coolibar UPF 50+ Baby Swim Diaper Cover - Sun Protective Polyester/Spandex Blend Pull On closure UPF 50+ - protects against 98% of UVA and UVB rays Aqua SUNTECT&reg;: Chlorine and saltwater resistant with 4-way stretch Fully lined; Swim diaper cover (to be worn over a swim diaper) Easy care: machine wash, line dry; Imported Recommended use for baby's splashy pool or beach days in and around the water