The N95 mask can filter at least 95% of airborne particles larger than 0.3 micrometer in diameter. So PM2.5 particles which are 2.5 microns in diameter can be filtered well by these masks.

The original Manta Sleep Mask has more than 13,000 reviews on Amazon alone, and the brand says it's helped over a million people improve their sleep. My bedroom has large windows and sheer day ...