Monthly SiHy contactlenses (Refresh - refresh your eyes) state-of-the-art, silicone hydrogel monthly contact lenses are meant for usage during an extended period of time every day. They are ideal for people seeking additional comfort, when wearing lenses for a long period of time, because those lenses are thin and soft and they have rounded edges to ensure additional comfort. The material of lenses enables the surface to attach water so that additional moisturising is not necessary, and they have outstanding oxygen permeability.