sleep mask,sleeping mask,night mask,eye patch for sleeping,night sleep mask,sleeping mask,eye patch for sleeping,to sleep,sleeping masks Zero Light Leakage - Our double-reinforced design, which combines an innovative nose cutout and light-blocking fabric, ensures your eyes stay completely dark even in the brightest conditions. Ice silk material- not only absorbs heat, but also feels smooth and comfortable against the skin. Super Lightweight- This sleep mask is just 30 grams in weight, you might even forget you're wearing a mask. dom of movement - we design our masks with enough space so that your eyelashes are never constrained. Why do you need a sleep mask? The hormone that regulates the day-night cycles of the human body and controls recovery phases during sleep is called melatonin, and sufficient darkness is needed to produce this hormone. The slightest exposure to light, with a smartphone screen for example, can disturb your sleep. However, an expert-designed mask will naturally help you increase your melatonin levels and improve your REM sleep.