Will you really get 100% blackout?

Very likely, yes. We have hundreds of thousands of happy customers and 99.99% of them report 100% blackout (no light leaking in). This is because of the adjustable eye cups. Most generic or cheap sleep masks let light through around the nose area. However, the Manta AROMA Mask’s eye cups are adjustable, which means the product can conform to your face and nose shape to create a perfect seal.