Quick Dry Fabric: Breathable, quick-drying fabric provides your kids with cool and comfortable wear. Please see the size chart in the last picture for the correct size Adjustable Fit: Built-in adjustable drawstring on the waistband keeps your boys swimsuit in place Comfort for Swimming: Flatlock seams construction design for the kids' swim jammer to reduce irritation from chafing Sun Protection: UPF 50+ protect your skin from the sun's harmful UVA/UVB rays Occasions: The boys' swim short is a quality swimsuit for your kids; Lightweight and flatlock seams design are improving your kids' swimming speed in the water; The swimming shorts are perfect for swim team practice, swimming competition, swim lessons, training learn to swim and all kinds of water activities around the pool or beach