Polarized for top performance in high-glare environments
Don't let the name fool you – there's not a gram of dead weight on the Ballast. Its frameless design and Costa's revolutionary 580P polycarbonate lenses combine for one ultralight package. 580P lenses deliver the crisp, clear, color-perfect optical performance you expect from Costa glass in featherweight polycarbonate. Plus, Costa's advanced polarization process virtually guarantees glare-free vision. They're scratch-, smudge- and dust-resistant, too. The durable, comfortable, low-profile nylon frame is a perfect fit for medium-size faces. Available: Amber Lenses/Tortoise Frames, Gray Lenses/Black Frames.