NMM Global--Offer You the WorldHow to get better sleep? The major factor for better sleep is the hormone Melatonin which regulates the day-night cycle of the human body and controls the recovery phases during the sleep. For the production of this hormone, the human body requires sufficient darkness. Even a little portion of light during sleep is a disturbance. Sleep mask just prevent light from you. You would absolutely get better sleep when you sleep with a comfortable sleep mask. Why NMM Global sleep mask? NMM Global is a brand dedicating to offering the top-quality commodity to our customers. Our silk sleep mask is made of 100% top quality mulberry silk on both sides which makes it unbelievably soft, smooth light and hypoallergenic. We are NMM Global, worthy of your trust.When need sleep mask? --When you have problems to fall asleep or suffer from migraine --When you would like to sleep on the daytime because of travelling, camping, shift work--When you need totally relax during yoga, meditation, nap or you are a side-sleeper--When you choose gifts for families or friends