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Material: 100% Silk ( both sides)Silk Momme Weight: 16.5Size: 8.26"x3.54" / 21cmx9cmColor: blue and white outside, black insideEnjoy your sleep at home or in travel with this 100% silk sleep mask. The gentle silk will protect your skin while blocking the light. It is big enough to prevent any light leak. Besides it has an adjustable elastic band so it will not go loose.