I have received this great product for free in exchange for my honest and unbiased review.  It is another sleep mask and this one is silk, one size fits all and there is an adjuster in the back of it. It is not bulky and will not cause you to be too hot in the face, like the heavier sleep masks can do depending on the type of material it is made out of. It is black and I have tested it even outside and it is completely dark, no light is going to seep in. If you are looking for a product that does the job and does not…