1. MATERIALS & WORKMANSHIP: The outside of the sleep mask blindfold is made of selected silk features smooth and comfortable. The inside is filled with soft and breathable cotton. They are both gentle materials, won't make your skin allergic. Also, with very carefully managing process, you will enjoy the sophisticated knitting and touch feeling 2. WIDELY ADJUSTMENT RANGE: Adjustment buckle allows this sleep mask to have a wide range of size adjustments. In addition, the strap also has well elasticity, making it comfortable to match the head circumference range of 48-64CM (18.9''-25.2''). This size range is suitable for both children and adults even with very large head circumferences 3. BLOCK OUT ALL LIGHTS: Sensitive to light? Our sleeping mask fits perfectly around your eyes according to human facial contour, which effectively block lights coming through eye and nose area. Enjoy pure darkness when wearing it, allows you to sleep regardless of the light around you 4. SOFT & COMFORTABLE: Thanks to the selected soft and light materials, each sleep eye mask weights only 15g. The mask provides considerable comfort with its soft. You will feel very few hinder on your face whether you are lying down or sleeping on your side. This feature will significantly bring you a more comfortable sleep experience