COLORVISION Gray's blend of gray tones creates a distinctive and gorgeous finish. You can achieve a stunning result by combining the dotting technique, which leaves 20% transparency while making the colors appear natural. Details of the product material of the lens: Hima 55 55% of the water is water. Base Curve: 8.6 Center Diameter: 14.2 0.04 in thickness Contents of the package: a pair of lenses Use period: up to 14 hours per day for a maximum of two months