Costa's 580 lens technology blocks the yellow light at 580nm that causes eye fatigue and enhances reds, greens, and blues for unmatched visual acuity on the water. The 580P variant uses lightweight polycarbonate for impact resistance without sacrificing the signature 580 color enhancement — perfect for active use. Polarization eliminates reflected glare from water, roads, and other flat surfaces for safer, sharper vision. Choose 580G for the scratch-resistant clarity of glass, or 580P for the lightweight resilience of polycarbonate. Both feature Costa's C-WALL hydrophobic coating that sheds water, oil, and salt.