You know that feeling you get when you've been wearing sunglasses all day? Well, forget it. This member of our super-light frame-less collection weighs in at a feathery 16 grams. And with TR90 nylon Ballast is as durable as it is Comfortable. Top it all off with Costa's premium lenses, and you've got a pair of sunglasses that's at home in, on, and around the water. Comfortable medium fit.