Its quite possible that the X Metal frames on Oakleys Half-X Sunglasses could be used in the construction of the next lunar module. Instead, the ultra-light, ultra-strong titanium alloy secures the top half and temples of your Half-X shades. Oakley knows its a pain to be cycling or running and have your downward view obstructed by a frame, which is why these sunglasses use open-edge architecture. A Hydrophobic coating on the lenses helps prevent water sheens as well as smudges so youre not racing all day with a damn fingerprint in the middle of your line of sight. The more you sweat, the more the Half-X Sunglasses grip your face.