Air Optix Aqua contact lenses from Ciba Vision are made with a new silicone hydrogel material that allows up to 5 times more oxygen to flow through the lens than regular contact lenses. This means that Air Optix Aqua provides a comfortable contact lens with great visual acuity for up to 7 days straight without removal. The contact lenses stay comfortable and wet due to the AQUA moisture system which helps reduce the rate of lens dehydration. Air Optix Aqua are a monthly replacement contact lenses. Please consult with your optometrist for the wearing schedule that is best suited for your vision needs. There are 3 lenses in each box of Air Optix Aqua.