The supernova is packed with features. Customize your eyewear with the TRI.FIT™ system, for three level height adjustment of the temples; the Double-Snap Nose Bridge™ for two level height adjustment of the nose bridge; comes in 2 sizes: the lens shape of the a150 is deeper while the a151 is shallower to cater for perfect sizing and fit; weighing in at only 21 grams you’ll almost forget you’re wearing them, Quick-Release hinge™ system; Quick Change lens system™; Performance Insert™ compatible, Traction Grip™ temples for secure and all day comfort fit and inspired by ClimaCool™ ventilation with the vent holes at the temples ends, and Vision Advantage ™ PC lens with LST™ tint.