FREQUENTLY ASKED QUESTIONS Can these masks really provide better protection while being "thin"? Absolutely, AirQueen has a unique patented Nanofiber technology that provides both protection and comfort. Nanofibers are significantly more densely knitted compared to the conventional cotton that's made for "medical masks". This means that the "thickness" of a mask does not equivalate to its efficacy. What does the date on the package mean? EG. "? 2020.04" printed on the back of the package is the "Date of Manufactured" (when the masks were made). Face masks don't typically expire. We do uphold the highest standard of safety quality and by recommending using your masks within the first 3-5 years of the manufactured date. Why is the average cost of AirQueen and Korean Masks more than others? South Korea has stricter quality control than most countries in Asia rest of the world. South Korea's minimum hourly wage in 2019 was ranked seventh highest among OECD countries. Higher overhead costs assures us consumers regulated work, health and safety, quality, cleanliness, and no exploitation of factory workers. Of course there are many cheaper face masks online where you can buy for as low as 0.65 per mask, but what was the sacrifice that was taken in place for us consumers to enjoy the "low costing masks"? Are Airqueen disposable masks reusable? Why do the masks make a crackling noise Initially this may sound like an oxymoron but, due to our patented nanofibers and the special polyurethane coating on the mask (which is the crackling noise) can provide up to 10x of re-usage. Here's the recent research article that demonstrated the difference between Cotton, Nanofiber and it's features. www.researchgate.net publication 342258040_Reusability_Comparison_of_Melt-Blown_vs_Nanofiber_Face_Mask_Filters_for_Use_in_the_Coronavirus_Pandemic (Shinshu University, 2020)NON-ODOUR - Our Fresh Safe AirQueen masks that do NOT have any factory poisonous smell to it. Compared to other masks that are made in the factory, these are made in the lab! We have our Airqueen masks imported here in Canada, ready to be shipped. These masks are "Water Repellent" face masks for the upcoming cold winter in Canada. Excellent permeability lets the moisture escape to make you feel comfortable for a long time. LIMITED TIME SALE - These masks are "Water Repellent" face masks for the upcoming cold winter in Canada. Excellent permeability lets the moisture escape to make you feel comfortable for a long time use. MADE IN SOUTH KOREA - Air Queen Nanofiber Filter Masks are specially engineered using advanced nano fibers for effective filtration of 97 (Centre of Disease Control, 2020). REUSABLE - Nanofiber masks can be reused at least 10x while retaining its efficiency in filtration. We recommend to use 60-75 ethanol spray after usage (Research conducted by POSTECH in South Korea and Shinshu University in Japan). ULTRA THIN LIGHTWEIGHT - This High-End mask is specially made to fit comfortably with its ergonomic and lightweight design. Each mask weighing less than 4.38g. You won't even realize you are wearing it. We made it even more lighter and effective!.