Costa Del Mar Ballast You know that feeling you get when you've been wearing sunglasses all day? Well, forget it. This member of our super-light frameless collection weighs in at a feathery 16 grams. But lightweight doesn't mean fragile. TR90 nylon and polarized polycarbonate lenses make the Ballast as durable as it is comfortable. Top it all off with Costa's COSTA® 400 lenses, and you've got a pair of glasses that's at home in, on and around the water.

• Hinge: Integral
• Lens Size: L
• Frame Fit: M
• Lenses: Polycarbonate