Popular snorkel vests are constructed of durable, industry standard 210 denier urethane coated nylon. All have safety whistles, crotch straps, screw down oral inflators, and they come in 3 sizes (Kids, Adult, XL). Each style is available with standard plastic inflator valve or optional metal inflator valve. The Deluxe Snorkel vests are two color vests complete with ribbed baffles for added style and comfort.