The Omega series is the latest in Ripcurl design and technology at a budget price. The Omega is as versatile as they come so it can be used for your next waterski trip or taken along for a jetski adventure. It's designed to be a flexible fit including a crutch strap for the 4-6 Size. Australian Standards L50s Approved Features: SINGLE BUCKLEFor easy on and off. SEAMLESS UNDERARMNo seam chafe with smooth underarm panels and clean finish. ERGONOMIC DESIGNEngineered for the ultimate in comfort.