One brand of contacts we carry is Hydrogenics. Hydrogenics 60 are weekly replacement standard contact lenses made from 40-percent polymer. If you have standard eyes needing contacts, Hydrogenics 60 contact lenses can be replaced every one to two weeks. Each box of Hydrogenics in our store comes with six lenses. While using weekly disposable contact lenses, such as these Hydrogenics 60 lenses, the lenses should be stored in solution and also cleaned after use. As these Hydrogenics contact lenses are flexible soft contact lenses, more oxygen is able to reach the eye during use.