Everyone sleeps better when it's dark! Official U.S. Navy NWU sturdy cotton/nylon ripstop fabric is on the top side of this comfortable mask. Your choice of soft black fleece, silky black satin, or soft dark gray cotton knit is on the back. Pattern placement will vary. Product is legally handmade with authentic NWU fabric and is not a product from the U.S. Navy, nor is onetwothreejump claiming to represent the U.S. Navy in any way. Size: Mask is about 8 inches by 3 inches from center. Elastic measures about 12.5 inches. Sized for an average adult/teen with a head of about 21-23 inches.