Base Curve: 5 Polycarbonate: Polycarbonate is lightweight, comfortable, impact resistant, and provides UV protection. Nose Grip: Flexible, shock-absorbing grip insert on the bridge. Grip Tech Temples: Exclusive soft material on the temples that doesn't stick to hair, for perfect grip and comfort. Panoramic View: Wide lens surface for maximum field of vision. Full Venting: Highly vented sunglasses structure allowing full circulation of air to prevent fogging. Air Link Temple System: Elastomer shock absorber insert at the end of the temple for improved comfort and lightness. Weight: 25g