Eye blindfold of light blocking: The unique 3D hump design is aimed to keep eye mask material out of contact with eyes. The space for eyes is wider and deeper than flat sleep mask. Lightweight and breathable, there are two ventilation holes on both sides of the eye shades designed to allow air to circulate through the eyes, alleviate eye fatigue and make you sleep quickly. High quality:In order to fix the hump model, we use light blocking fiber to make this eye cover.