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 & Type III approved for child and youth sizes. Infant sizes feature pop-up pillow, leg strap & grab strap for added safety and quick recovery. Child sizes feature leg strap & grab strap. For infants up to 30lb.