One-piece tank suit featuring "trunks" style bottom maintains buoyancy and stability in the water, while increasing their confidence, as well as aiding in muscle development. Our one-piece flotation swim suits are made of nylon/Lycra blend with UL approved foam blocks sewn securely into the mid-section, both front and back. Children under 25 pounds may need hands-on supervision until they develop enough coordination and/or weight distribution to float alone. Be sure to order the correct size for proper performance. Multi-segmented hinged front and back foam design for extended wear. Nylon Lycra Spandex is quick drying, naturally anti-bacterial and offers SPF/UPF 50+ protection. Made in the USA.