The oxygen-permeable Air Optix Colors monthly lenses are coloured contact lenses that have been developed using the well-known 3-in-1 colour technology, but with one essential difference: The colour is on the inside of the lens, which accentuates the eyes more.The lenses are made from the new silicone hydrogel material lotrafilcon B with a water content of 33%, and their oxygen permeability is up to six times higher than that of other leading coloured lenses. For Air Optix Aqua contact lens wearers, no readjustment is required.