Xtensa SiHy is a monthly silicone hydrogel contact lens that provides excellent vision, eye health and comfort. Its silicone hydrogel material combines outstanding oxygen transmissibility (119 Dk/t) and a Class 1 UV Filter (blocking 90% of UVA and 99% of UVB). Available in spherical, toric and multifocal geometries, Xtensa SiHy gives you a generous range of options for myopia, hyperopia, astigmatism and presbyopia.