AirOptix from Cibavision are available in a one week continuous wear or as a 30 day continuous wear lens. AirOptix lenses are manufactured from a unique material allowing up to 5 times more Oxygen to reach the surface of your eye than with conventional lenses. AirOptix, the 6 day continuous wear lens from CibaVision has an oxygen transmissability rating of 138DK/t and AirOptix Night and Day, the 30 day continuous wear variety 175DK/t, guaranteeing a comfortable and healthy experience.