Monthly Extreme H2O 59 % Xtra contact lenses are designed for wearers who work with computers and in air-conditioned rooms. They have a higher starting water content (59%), and are made from a biocompatible material that helps replace any moisture that evaporates. Extreme H2O 59 % Xtra contact lenses are comfortable because they are so delicate, but be careful when handling them! The production of lenses with certain parameters has been terminated. It is therefore not possible to order the parameters which are not shown.