Mustang Survival Lil' Legends 100 Vest Child Size 20 to 50 LBS is the best-in-class in-water performance and all-day comfort in big water. Developed in response to parents' requests for a more comfortable flotation vest that improved mobility and reduced thermal burden. Leveraging the trusted and proven in-water performance of the original Lil' Legends series, the design has been overhauled with better materials, advanced cooling and reshaped mobility panels. With a segmented head pillow, shaped mobility panels and an exclusive Cooling-Channeled interior back panel, advance field testing has proven Lil' Legends to be a top choice of both parents and children. Designed for coastal and offshore boating.