This 100% silk sleep mask is hand-dyed with indigo, chlorophyll, logwood, turmeric and cochineal to create a soft swirling kaleidoscope of colors. Backing is made of light-blocking black 100% silk charmeuse.The fit and design has been perfected over years to block as much light as possible, while providing extreme comfort. The elastic headband is adjustable, and is placed so that it rests comfortably without hitting your ears.