SwimZip's sunsuits are made for fun in the sun. Protecting baby from the sun starts day one, and wrapping your baby up in something that is comfortable and sun protective is our number one goal. Our full-zip one piece swimsuit for babies and toddlers offer superior sun protection while making diaper changing a breeze because it's easy to zip right off. All SwimZip swimwear styles with SPF 50+ (called UPF 50+ for fabrics) provide UV Protection blocking 98% UVA & UVB rays.