Manufactured with the same technology as a SCUBA diving buoyancy jacket . the tough 420 D nylon exterior is coated with TPU on the inside for fail safe operation. Inflation is made easy with a low resistant oral inflation valve which also dubs as a secondary exhaust valve. The primary exhaust is located on the right chest for rapid deflation after use or when assuming the snorkelling / swimming position on the surface. Rolled collar with felt lining increases wearer comfort. Special pattern design and fastening system eliminates the need for a crotch strap and can be worn more comfortably and safely around the body than a traditional vest. Come complete with a pocket and a dry pouch to store small personal items.