The Pluto is a similar shape to the square but has a heavier bridge which coupled with the free flowing temple, gives it a sportier look. Good clean lines & very comfortable to wear. A style that feels at home & anywhere. Rubber coated tips relieve cranial pressure on the temporal bone. Anatomically designed metal frames are meticulously formed from a fusion of components that ensure comfort & fit. Optical sprung hinges for a comfortable formed fit. Hypoallergenic, anti-slip, adjustable pads resistant to most cosmetic ingredients & natural perspiration. Lenses provide 100% UV protection. With Karbon 8 lens technology, our optical class 1 lenses are made from super tough, high impact material. This lens transmits the full colour spectrum. It does not change the way colours are seen & is ideally suited for prolonged wearing in bright conditions & for people who have intolerance to colour transformation.