Longest service life of any passenger type jacket. The MK20SV features: 10 Year service interval, suitable for adults and children, average weight of 525g, based on proven design & quality , shape of lifejacket avoids the dangers associated with "water channeling", unique head restraint system ensures that lifejacket will not ride up over wearer's head. It is also fully reversible, supplied in robust clear view "tamperproof" sealed valise which is obvious and simple to open and can be shaped to satisfy specific customer requirements. Crew (orange) versions also available. **** Please Note: This item is subject to a £35.00 minimum Hazardous Shipping Charge****