Bolle Mercuria 2.0 sunglasses and case. Part of the Street Metals Collection. Dual Composition Frames - Nylon and metal fused together in our Metals frames providing increased comfort. • Spring Hinges - Adjusts to the perfect fit. They are comfortable and won't dig into your temple. • Hydralon&trademark; Frames - Patented frame material that is virtually unbreakable and can be molded to fit your head perfectly. • Thermo-Grip&trademark; Temples and Nose Pads - Non-slip, even when you sweat. • Absorber Hinge - Like the spring hinge, absorbs shock. • Wire Core Temples - Can be adjusted to custom fit your face. Gently used condition