The Bob Soven Signature Vest is made with advanced Aerolite segmented foam panels covered with a Vapor Stretch outer shell. The Magnaflex construction allows flex in every direction for a terrific ergonomic fit and an overall lighter vest. This zippered pullover vest has an ultra low profile design that's anatomically cut for comfort. The Bob Soven Vest also features ultra light super plush Aqua Stretch interior lining, strategically placed mesh drain panels, and a boardshort connector. Not USCG approved. Men's sizes: S(28"-32"), M(32"-36"), L(36"-40"), XL(40"-44"), 2XL(44"-48").