sleep mask
Sleep Mask by Bedtime Bliss®
Light, breathable material that completely blocks the light to enable you sleep soundly at any time of day or night. Comes with a pouch for those who travel frequently.
ALASKA BEAR® – Natural Silk Sleep Mask Review – Help U Sleep
In pitch darkness the body starts actively producing melatonin, a hormone that helps it respond to the inner sleep clock. If there is even an ounce of light, your body could stay switched on as though it was day.