One of the two straps snapped as soon as I tried one of the masks on. As it is made up of cheap plasticky material, so it keeps tightening like a noose on your eyelids; which prompted me to just throw it away after an hour or so of first use. Besides, if you are as susceptible to sunlight (or any bright light) disturbing your sleep, then it is very thin to stop enough light to let you sleep undisturbed anyhow.
I know it is cheap, but still money is money. Better off looking elsewhere if you want your eye mask to last few nights. I regret this purchase.