Features stretchable Flex-Back insert to provide greater range of motion. Popular graphics and comfortable Poly-Span polyester/spandex material for increased flexibility and stretchability. Bright colors on shoulders for greater visibility in water. Meets USCG Type II approved for infant sizes and Type III approved for child and youth sizes. Infant sizes feature pop-up pillow, leg strap and grab strap for added safety and quick recovery. For infants up to 30lb.