The verdict in brief
Flo Mask is a US-made, medical-grade respirator built around a 3D-scanned silicone seal and polycarbonate housing, with a remarkable performance in the BARDA/NIOSH innovation challenge. R-Pur is the French technological leader with a patented 8-layer nanofiber filter that captures particles down to 0.05 microns and includes an activated carbon layer against gases. R-Pur wins on ultrafine filtration, gas protection, filter lifespan, sports design, and warranty. Flo Mask retains an advantage on its medical certifications and the comfort of its silicone seal.
Winner: R-Pur Nano Light. Patented 8-layer nanofiber filter with activated carbon, filtration down to 0.05 microns, filter lifespan of several weeks, and 5-year warranty.
R-Pur vs. Flo Mask at a glance
| Feature | R-Pur Nano Light | Flo Mask Pro |
|---|---|---|
| Filtration | PM2.5, PM10, NO₂, pollen, bacteria, viruses, gases (down to 0.05 micron) | Sub-micron particles, over 99% efficiency (particles only) |
| Filter Technology | 8-layer nanofiber with activated carbon (patented) | Electrostatic Pro Filter in polycarbonate housing |
| Filter Lifespan | 5 to 15 weeks per cartridge, replaceable | ~40 hours per Pro Filter |
| Replacement Cost | €29 per filter | ~$5 to $8 per filter, but frequent replacement |
| Size Options | One size with memory foam | One adult size with two nose bridge options |
| Materials | Neoprene shell with nanofiber and carbon filter | Medical-grade silicone with polycarbonate housing |
| Valve Type | Dual exhalation valves | No dedicated valve (airflow through filter) |
| Maintenance | Washable shell | Wipe-clean silicone shell |
| Mask Price | from €119 | ~$59 to $69 |
| Made in | France 🇫🇷 | USA 🇺🇸 |
| Warranty | 2 years | Limited |
| Ideal for | Daily cyclists, motorcyclists, allergy sufferers, athletes | Clinical protection, infection control, medical environments |
| Our Rating | 4.5/5 | 4.2/5 |
Why compare R-Pur and Flo Mask?
Flo Mask and R-Pur both sit at the premium, engineering-focused end of the reusable mask market, but they arrived there via opposing paths. Flo Mask built its reputation on clinical credibility: a 3D-scanned silicone seal designed to fit a wide variety of face shapes, a polycarbonate housing, and a remarkable performance in the BARDA/NIOSH innovation challenge. It is, in essence, a medical-grade respirator for the general public. R-Pur approached the problem through the filter, developing a patented 8-layer nanofiber cartridge that captures particles down to 0.05 microns and integrates an activated carbon layer to absorb gases and exhaust fumes.
The decision usually comes down to what you're protecting yourself against and how you wear it. If you want a clinical-grade particulate respirator for indoor or medical use, Flo Mask is a serious option. If you commute, cycle, ride a motorcycle, or live with traffic pollution and allergies, you need the tightest possible ultrafine filtration as well as gas protection — and that's where R-Pur takes the lead. We compared the two on seven criteria, and R-Pur came out on top in five of them.
R-Pur in brief
R-Pur was founded in 2016 by Flavien Hello, a Parisian motorcyclist frustrated by the lack of consumer masks capable of filtering ultrafine particles. The brand's flagship product, the Nano Light, uses a patented 8-layer nanofiber filter with an activated carbon layer, entirely manufactured in France. R-Pur targets daily commuters, motorcyclists, and cyclists who view their commute as a serious activity, and is the premium technical choice in the European anti-pollution mask category.
Flo Mask in brief
Flo Mask is an American brand built around a medical-grade silicone seal and a polycarbonate housing. Its Pro filter offers sub-micron filtration exceeding 99% with FFP2 certification and KN95 testing, and the brand won Phase 1 of the BARDA/NIOSH innovation challenge. The silicone seal was designed from 3D scans of faces representing multiple ethnicities to fit approximately 90% of adults with two nose bridge sizes. Flo Mask is particularly popular with users seeking a reusable, clinical-grade respirator made in the USA.
Filtration & protection
R-Pur's 8-layer nanofiber filter captures particles down to 0.05 microns (50 nanometers), including ultrafine diesel particles, NO₂, pollen, bacteria, and viruses, and its activated carbon layer absorbs gases and odors. Flo Mask's Pro filter is an excellent performer against particles, exceeding 99% sub-micron efficiency with FFP2 certification, but it is a particle-only filter without activated carbon. This means Flo Mask does not address exhaust fumes, VOCs, or the gaseous component of wildfire smoke. For cleanroom particulate filtration or infection control, Flo Mask is excellent. For commuters and motorcyclists exposed to traffic gases and ultrafine diesel particles, R-Pur offers measurably broader protection.
Advantage: R-Pur
Comfort & fit
Flo Mask's strong point is its 3D-scanned silicone seal — a soft, plush seal designed to fit a wide variety of face shapes with two nose bridge sizes. For users who find a good fit, the silicone seal is genuinely comfortable and provides a secure sealing sensation. R-Pur uses a contoured neoprene shell with dual exhalation valves and three dedicated sizes, which manage moisture and airflow during active wear. Flo Mask has the advantage for static indoor comfort; R-Pur is designed for movement, with valves that vent heat and moisture during cycling, motorcycling, and daily commutes.
Advantage: Flo Mask for static comfort, R-Pur for fit in active use
Design & aesthetics
Flo Mask has a decidedly clinical look: the polycarbonate housing and silicone seal evoke medical equipment, which is reassuring in a healthcare context but draws attention in everyday social situations. R-Pur opts for a refined, technical look, with dark neutral colors and a profile that resembles commuter gear more than a respirator. For daily urban use, R-Pur blends more naturally into the background; in a context where visible, medical-grade protection is an asset rather than a drawback, Flo Mask's appearance works in its favor.
Advantage: R-Pur for everyday wear
Filter lifespan & long-term cost
This is the most significant difference in this comparison. R-Pur's nanofiber cartridge lasts approximately 5 to 15 weeks depending on air quality and daily use. Flo Mask's Pro filter is designed for about 40 hours, which is approximately one week of typical daily use — meaning Flo Mask owners replace their filters much more often. Even if the unit price of the Flo Mask filter is lower, the frequency of replacement adds up: a Flo Mask user can consume a dozen or more filters during the lifespan of a single R-Pur cartridge. Over a year, R-Pur's long-lasting cartridge is the most economical and hassle-free approach for daily wear.
Advantage: R-Pur
Sizes & inclusivity
R-Pur offers three adult sizes (S, M, L) plus a dedicated children's line, allowing buyers to precisely fit the mask to their face shape. Flo Mask uses a single adult shell with two nose bridge options, designed from 3D scans to fit approximately 90% of adults. The 3D scan approach is clever and works well for average proportions, but a true multi-size range still offers a more precise seal at the extremes. For smaller or larger faces, R-Pur's dedicated sizes ensure a more reliable fit.
Advantage: R-Pur
Durability & materials
R-Pur manufactures entirely in France with detailed published information on filter materials and supply chain, and its long-lasting cartridge means fewer discarded filters over time. Flo Mask is made in the USA from durable medical-grade silicone and polycarbonate, materials chosen for a robust reusable shell. The biggest difference in durability lies in filter consumption: Flo Mask's ~40-hour filter cycle generates several times more disposable filter waste than R-Pur's multi-week cartridge over the same period. Both have durable, well-built shells, but R-Pur's filter longevity gives it a lower recurring footprint.
Advantage: R-Pur
Warranty & customer service
R-Pur guarantees the Nano Light for 5 years and considers the shell reusable indefinitely — one of the longest warranties in the category. Flo Mask offers a more limited warranty, typical for its price range. Both brands have responsive support and active filter supply programs. R-Pur's local European presence means faster delivery and easier returns for EU buyers; Flo Mask's US base is stronger for North American customers.
Advantage: R-Pur
Who should buy R-Pur?
Choose the R-Pur Nano Light if you commute or train daily, ride a motorcycle or bicycle, suffer from allergies or respiratory sensitivities, want a replaceable filter system that lasts several weeks per cartridge, or need gas protection against traffic fumes and wildfire smoke. R-Pur is the right answer for serious daily users who want the tightest filtration with activated carbon, guaranteed for 5 years.
Who should buy Flo Mask?
Choose Flo Mask if you want a reusable, clinical-grade respirator for indoor, medical, or infection control use, value FFP2 certification and BARDA/NIOSH pedigree, prefer a silicone seal designed from 3D scans, or are based in the USA where Flo Mask's distribution and support are strongest. Flo Mask is an excellent particulate respirator, but it loses this comparison on gas protection, filter longevity, and warranty.
The verdict: R-Pur wins
R-Pur takes the lead on five out of seven criteria: filtration, design for daily wear, filter lifespan and long-term cost, available sizes, durability, and warranty. Flo Mask wins on the static comfort of its silicone seal and provides genuine medical-grade certifications. The deciding factor is the breadth of protection combined with the running cost: R-Pur's 8-layer nanofiber cartridge filters down to 0.05 microns, integrates activated carbon for gases, and lasts several weeks per filter, while Flo Mask is particulate-only and requires replacement approximately every week. For daily commuters and motorcyclists, the R-Pur Nano Light is the better long-term choice.
Frequently Asked Questions
Is R-Pur better than Flo Mask?
For daily commuters, cyclists, and motorcyclists, yes. The R-Pur Nano Light uses a patented 8-layer nanofiber filter that captures particles down to 0.05 microns and integrates activated carbon for gases, while Flo Mask is a particulate-only respirator. R-Pur's filter also lasts several weeks rather than approximately 40 hours, making it less expensive to use and broader in its protection.
Does Flo Mask have an activated carbon layer?
No. Flo Mask focuses on particulate filtration and does not include an activated carbon layer, so it does not absorb gases, exhaust fumes, or VOCs. R-Pur integrates activated carbon into its 8-layer filter stack for protection against gases and odors.
Which lasts longer, R-Pur or Flo Mask?
R-Pur filters last approximately 5 to 15 weeks of daily use depending on air quality. Flo Mask's Pro filter is designed for approximately 40 hours, which is about one week. R-Pur filters last several times longer per replacement.
Is Flo Mask medical grade?
Flo Mask's Pro filter is FFP2 certified, KN95 tested, and the mask won Phase 1 of the BARDA/NIOSH innovation challenge, giving it strong clinical-grade credentials for particulates. R-Pur is designed for ultrafine particulate and gas phase filtration, targeting urban pollution and driving.
Can R-Pur be worn for cycling and motorcycling?
Yes. R-Pur offers dedicated configurations for cycling, running, and motorcycling, with dual exhalation valves and breathable construction. Flo Mask has neither a dedicated valve nor sport-specific models, making it less suitable for active, high-airflow use.
Which is better for allergies?
R-Pur. Its nanofiber filter captures pollen and biological particles down to 0.05 microns, and the activated carbon layer also addresses odors and gases. Allergy sufferers consistently report good results with R-Pur.
Where is each mask made?
R-Pur is entirely manufactured in France. Flo Mask is made in the USA. Both are durable, well-built reusable masks, but R-Pur's filter longevity results in lower long-term filter waste.