NOSK Nasal Filters are a small conveniently sized nasal filter that fits into the nostrils to filter out any dust and other particles like pollen. The filter material has undergone testing and meets the N95 standard of filtering out 95% of the dust particles during tests. 

The nasal filters come in a convenient hard plastic casing that fits two nasal filters and will fit anywhere in your pockets or bag. The filters can also be gently washed in running water when dirty to extend their working life. The filters will need to be replaced when the filters become too soft to hold their shape inside the nostrils. The filter holder is also marked with one side being cloudy so that you can identify the sides used for hygiene purposes.

Many industries such as power plants, marine and construction industries etc purchase and use NOSK. It can also be applied to daily usage for people who have dust particle allergies or during the haze. Many people prefer to use NOSK rather than the normal mask while they work as the normal mask is uncomfortable.
 In addition, the Thesis of NOSK has been presented in 2012 American Academy of Allergy Asthma & immunology (AAAAI), in California, USA.