Frequently Asked Questions

The filters are made with hypo-allergic materials and had been tested for their safety via several studies (you can find the results of those studies in our Blog articles). Additionally, as a business we never had a complaint for any allergic reaction to the filters but it is always wise to test the product to a non-sensitive part of the skin, for several short time periods before proceeding with extended use. Also, you should always be aware of any changes you might feel when using the filters (such as difficulty breathing, or any other potential symtom you may encounter).  If you experience any syptom, you should stop using the filters immeditately and report your issues to us for future reference.

There are scientific studies showing that nose filters allow you to filter to a high degree most types of airborne particles when inhaled via your nose. Those particles may include airborne viruses including the flu-virus, coronavirus, or other viruses.

Currently, there are no official studies investigating the level of protection of nose filters specifically against viruses, including coronavirus, but there are several indirect studies that can help us extrapolate some reasonable conclusions.

In short, nose filters cannot guarantee to you 100% protection against any virus, including the flu-virus or/and the coronavirus (and frankly speaking, no honest company can make this claim for any of their products), but they could be a good additional step for you to add one more layer of protection against airborne viruses.

You can read in more detail about our evaluation of nose filters against the coronavirus here.

Not each person can respond the same to the Nose Filters, however based on scientific studie(s) (that can be found in our Blog posts) the nose fitlers do effectievly reduce exposure to airborne particulate matter, which typically contains mirriads of allergens that often trigger asthma. There is also consistent, emperic evidence of the effectiveness of the nose filters as reported the vast majority of their users (testimonials showing in our website and in several other external websites), shows that there is usually drastic improvement in the Nose Filters user's respiratory system health and overall health, especially when it comes to prevention of allergic reactions caused by airborne allergens and pollutants.
According to the manufacturer, you may wear the filter continuously for up to 24 hours. Some user reportedly do both outdoor and indoor everyday activities while using the filters without facing any issues. Officially, we suggest that you use them only when you have to (as is the case with dust masks), for example outdoors during days with heavy paritculate pollution. You shoud be always cautious when first using the filters, and wear them only for limited time (15  minutes) during your first application before gradually increasing the time that you wear them, once you realize that the are no negative effects occuring from their use.
There are 7 pairs of FDNS Nose filters in the package that is available for sale in our shop. That is enough to use for up to 1 week (one filters for 24 hours if used properly)
In the shop we have available the medium size which is good for the vast majority of adults with small to average nostril length size.
  1. Clear nasal passages and dry nose.
  2. Carefully remove nasal screen from protective backing.
  3. Open nasal passages as wide as possible.
  4. Place nasal screen with tip adjacent to tip of nasal passage adhesive side up.
  5. Apply by gently pressing seal around entire nasal opening.
  • For best results, use a mirror.
  • Keep the filters stretched when applying them to the nostril
  • If you mess up applying for the first time, remove the filters and try again.
  • Do not use the filters anymore if the filtering membrane becomes too polluted or if the adhesive material is not sticky enough to provide an airtight effect
For all of our email subscribers we offer a 10% coupon code to use for purchasing the FDNS Nose filters found in our shop. To get the code you just need to subscribe to our Newsletter by filling and accepting the form found on our Homepage. Then you will receive an email at your registered address giving to you a coupon code to use the next time you purchase our filters. The discount code can be used on the checkout / payment completion form. If you have any more questions send us an email and we will be glad to help!  
Shipping rates & delivery estimates Shipping charges for your order will be calculated and displayed at checkout. Typically the charges are as follow:
Destination Shipment method Tracking Code Estimated delivery time* Shipping  Rates**

International / Local

Standard Shipping Yes 8-15 business days


International / Local Express Shipping (EMS Datapost) Yes 2-7 business days


* The expected delivery time starts counting from the day  that the goods are shipped by our company. Prices are subject to change so please make sure you confirm you accept the shipping fees before finalizing your payment at checkout.
On this link you can find detailed info for our Refunds Policy. If you have any additional question please let us know by using the Contact Us form!