The Holbrooks come with Prizm lenses that fine-tune light based on what the eye needs for each environment and the slick frames lets you keep the pace whilst still looking ace. Square O metal icons and front rivet accents add further style.Taking inspo from movie stars of the the 1940s, 50s, and 60s, this fun design epitomises the spirit of exploration. The iconic American frame design is accented by metal rivets and Oakley icons, perfect for those who seek equal parts performance and style.HDO geometry offers the clearest, sharpest, most accurate vision through sunglasses possible, matching the demands of pro mountaineers, athletes and skiers. With Oakley\'s patented HDO technology, the single point of light only creates the single image, so the brain works less and this reduces eye fatigue.Lightweight O Matter frame material Square O metal icon and front rivet accent6 base lens HDO geometry - reduces eye fatiguePolarised and Iridium options available Prescription LensesAvailable with Prizm lenses to enhance colour, contrast and detail for an optimised experienceAvailable with Oakley prescription lenses : Power range +2.00 to -3.00CareTo help maintain the High Definition Optics (HDO) of Oakley lenses, your new eyewear comes with a specially-woven electrostatic Microclear bag for cleaning and storage. Using it will preserve the superior optical quality of Oakley\'s pure Plutonite lenses. Hand wash and air-dry the Microclear bag regularly.