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The Tightrope Sunglasses from Oakley are made from a ultra-lightweight hi-modulus C-5 metal frame material. These glasses make contact only at the nose bridge and temples, thanks to a Three-Point Fit that utilizes Unobtanium components to increase grip with sweat. It also comes with optimized peripheral vision and side protection of 8.75 base lens curvature. The lenses also feature UV protection of Plutonite lens material that filters out 100% of UVA, UVB, UVC and harmful blue light. Product ID# 2027121.