YUNS pure silk sleep mask is anti-aging, anti-sleep wrinkles and light-blocking. It’s a perfect item for light sleepers, shift workers, travelers, mediators and anyone who needs afternoon or day naps. <br><br> OEKO-TEX Certified (Standard 100). <br><br> YUNS Three Principles: <br> *Natural material <br> *Green technology <br> *Minimalist design <br> We only use the highest grade 6A mulberry silk which can guarantee the shine, thickness, softness and durability of our products. We adopt simple designs and packages to ensure our products more long-lasting and environmental-friendly.