Yamaha's 4 Buckle Vest is a 50N buoyancy aid and is fully constructed with the strongest nylon. Both the front- and the side of the 4 Buckle Vest are constructed with soft PVC-foam panels on the front and EPE-foam panels on the back to offer comfort and give additional protection. This vest comes with a D-ring to connect with an emergency cord and has a custom water draining system to ensure the water drains quickly when necessary. The strong YKK buckles and four adjustable webbing straps ensure excellent unisex fit for more comfort and safety.