One of the many benefits of these contact lenses is that you won't have to worry about impurities building up on the surface and causing allergic reactions or protein deposits because they are made for daily, single-use wear. The lenses' 55% water content is intended to keep you feeling so hydrated that you won't even realize you're wearing contacts all day. 30 contact lenses per box, ready to use the day after opening. Offered as: a hydrogel box lens material Water Ratio: 55% Air 27 permeability 14.2 mm in diameter Base Curve: 8.6 mm (minus / plus 8) Producer: Cooper Vision USA of origin