All live web access (search, fetch, and curl) is denied in this session, so I’m writing from established knowledge and citing only stable institutional URLs I’m confident exist.
First Defense Nasal Screens are disposable adhesive filters that stick over the outside of each nostril. Inventor Joe Moore pitched them on Shark Tank season 2 in May 2011, asking $500,000 for 10%, and left with a three-shark deal from Kevin O’Leary, Mark Cuban and Daymond John: $750,000 for 30% plus a 10% royalty. Unlike most on-air handshakes, the deal closed, and the company is still selling today. The closest alternatives fall into five groups: in-nostril filters (Rhinix, WoodyKnows), topical nasal gels, barrier nasal sprays, saline irrigation, and certified respirators such as N95s. Each trades comfort and visibility against how much it actually filters, and the clinical evidence is strongest for in-nostril filters and respirators, weakest for sprays and gels.
What happened to First Defense Nasal Screens after Shark Tank?
Moore walked in with something rare for the show: a signed distribution order from a Dubai company worth roughly $8 million over several years, which is why three sharks fought for the deal. The episode and terms are recorded in the episode list for Shark Tank. Earlier write-ups claiming the deal fell apart are wrong; Moore has said publicly that it funded and that the royalty structure, not the equity, is what made it work for both sides.
The company now sells direct through its own site and through international distributors, with Middle Eastern and Asian markets, where dust and smog drive demand, reported as its strongest. It has not published audited sales, so treat any revenue figure you read online as an estimate.
How do nasal screens work, and what do they stop?
A nasal screen is a thin, breathable filter membrane bonded to a hypoallergenic adhesive ring. You press one over each nostril, breathe normally, and discard it after a day. Because it filters outside the nose rather than inside, it is more comfortable than in-nostril plugs but visible at conversational distance.
Filtration depends on particle size. Pollen grains run roughly 10 to 100 microns and most dust is above 10 microns, so a mesh filter catches them well. Fine particulate matter is a different problem. The EPA defines PM2.5 as particles 2.5 microns and smaller, and a loose external screen is not a tested barrier against them or against viruses. Mouth breathing bypasses any nasal filter entirely, which matters during exercise and sleep.
Which similar innovations exist, and how do they compare?
| Approach | Examples | Best for | Main trade-off |
|---|---|---|---|
| External adhesive screens | First Defense Nasal Screens | Pollen, dust, yard work, travel | Visible on the face; single use |
| In-nostril filters | Rhinix, WoodyKnows, Breathe Pure | Hay fever with discreet wear | Fit and comfort vary by nostril shape; frames need cleaning |
| Topical nasal gels | NasalGuard-type gels | Light pollen exposure | Claims rest largely on manufacturer tests |
| Barrier nasal sprays | Cellulose powder, carrageenan sprays | Short outdoor exposure | Mixed trial results; reapplication every few hours |
| Saline irrigation | Neti pots, squeeze bottles | Clearing allergens after exposure | Must use sterile or distilled water |
| Certified respirators | N95, KN95, FFP2 | Wildfire smoke, PM2.5, infection control | Hot, conspicuous, needs a good seal |
On irrigation, the FDA’s guidance on neti pot safety is blunt: tap water is not safe for rinsing because of the rare but fatal risk of amoebic infection. Use distilled, sterile, or boiled-and-cooled water.
What does the evidence actually say?
The best-controlled work on nasal filters comes from Aarhus University in Denmark. Two randomized, double-blind, placebo-controlled crossover trials of the Rhinix in-nostril filter, published in the Journal of Allergy and Clinical Immunology in 2014 and 2015, found meaningful reductions in daily nasal symptoms during grass pollen season compared with a placebo device. Sample sizes were small, in the dozens, and the studies were manufacturer-linked. You can find both through a PubMed search for randomized nasal filter trials.
No equivalent independent trial exists for external adhesive screens. Their filtration claims come from company lab tests on the membrane, which is a different question from how well the screen performs on a moving face. The audience is real, though: the CDC’s National Center for Health Statistics reports that about a quarter of U.S. adults were diagnosed with seasonal allergy in 2021, in its data brief on allergic conditions in adults.
What does it take to sell a product like this on camera?
We shoot product videos for consumer health gadgets, and nasal products are the hardest category we handle. The product is tiny, it sits on a face, and the first reaction from any audience is a laugh. The fix is to earn the laugh in the first five seconds and then move immediately to the problem shot: a close-up of pollen on a windshield, a kid rubbing red eyes. Macro lenses and a ring light make a 20-millimeter filter legible on a phone screen; a wide shot of a smiling model does not.
The Shark Tank airing itself is a traffic event, not a sales plan. Founders we have worked with saw site visits jump by 20 to 50 times for about 48 hours, then fall to a modest new baseline within a month. A 60-to-90-second demo video needs to be live, hosted on a server that can take the spike, before the episode airs. Budget for a one-day shoot with a two-to-three-person crew lands in the $5,000 to $20,000 range depending on talent, location and how many cutdowns you need for ads.
The biggest thing that goes wrong is claims. A script line such as “blocks 99% of allergens” needs the test report behind it, and the FTC’s Health Products Compliance Guidance expects competent and reliable scientific evidence for exactly that kind of statement. We now ask for substantiation before writing the script, because re-recording voiceover after legal review costs more than getting it right once.
If you have seasonal pollen allergies and want a discreet physical barrier, start with an in-nostril filter, which has the trial evidence behind it, and keep adhesive screens for outdoor chores where visibility does not matter. For smoke or fine particulate days, skip nasal products and wear a fitted N95. If you are a founder building the next version of this category, commission an independent filtration test before you shoot a single frame of video.
