You'll recognize the CVO (or Canvas Vulcanized Oxford) as a classic style.However, this CVO features premium nubuck and full-grain leather uppers.Sperry took one of their popular classics and re-engineered it to create a lightweight performance shoe—the Gamefish CVO Sneaker. Purpose-built with your waterlife needs in mind, this shoe has a lot going for it besides a great casual look. We'll spell out all those features in greater detail below, but be assured, you're going to have a hard time not buying one in every color when you see what it will do for you. Imported.The Uppers: Their premium nubuck and full-grain leather uppers feature handsewn construction for durability and a luxurious look and feel. They not only look like they're ready for anything, they are actually 37% lighter than Sperry's original Billfish and 10% lighter than their Billfish Ultralite boat shoes.Vulcanized Construction: That's where the rubber meets the...er...leather! Using high temperatures, the upper is securely bonded to the outsoles for a classic look that's also strong and durable.The Midsoles: Sperry uses ethylene-vinyl acetate (EVA) in the midsoles for cushioning. And since they run the length of the shoes, these cushioned midsoles provide all-day, under-foot shock absorption.SON-R Technology: This patented system features a unique outsole design that works in combination with an interactive footbed to provide natural sensory feedback and awareness for greater stability and agility on multiple surfaces. This design enhances proprioception (the unconscious perception of movement and spacial orientation), effectively giving you the ability to See With Your Feet. Articulating outsole pods transfer sensitive information from whatever surface you're on to corresponding pods in the removable, interactive, compression-molded EVA footbeds and then to your feet.Adaptive Wave-Siping: Tiny, wavy slits in the rubber outsoles, in combination with larger and deeper wavy grooves, disperse water away from the soles and give you incredible grip. Whether your footing is wet or dry, these outsoles will help prevent you from becoming separated from the deck of your boat.Non-Marking: In addition to their nonslip properties, the soles won't make ugly black marks on the deck of