BASE CAMP M Cross Dust Mask, Reusable Breathable Comfortable Safety Face Mask for Work with Extra 6 Activated Carbon Filters

I’d like to start by saying I wear these masks daily for multiple hours at a time. I have been buying BaseCamp masks since the beginning of this year 2025. The fires that have crossed much of the Los Angeles area have led me to become hypersensitive to pollen and makes it difficult to breathe with the common N95 masks. These mask in every model so far (I have the N model, and all 3 M models so far) have allowed me to be outside in comfort and they all work so well at filtering pollen. I look forward to purchasing future models as I undergo immunotherapy and be able to go on long walks with my dog thanks to BaseCamp. Great price, amazing durability, easy to clean, replacing filters has gotten smoother with each design and speed of delivery is amazing.

I wear chunky square glasses and this didn’t fog them up, though my glasses did have to sit a bit awkwardly. Got for sanding miniatures and varnishing paintings and it works for both

Very good mask, great for helping with pollen

Hace muy bien su filtrado de aire se ajusta muy bien en la cara.la primera vez que la usé me sentí un poco falto de aire pero luego de un rato todo se normalizó creo que fue por lo nuevo de el filtro

I have asthma so I have to use a mouth cover to work out side. This mask is OK but it doesn't seem to let me breath as freely as I wish.

I have become very sensitive to sawdust and pollen. It affects my throat. So I've been trying various masks and respirators. If your concern is fine particles, this BASE CAMP mask is well worth a try. It fit my face fine and is better at blocking dust than my $165 respirator.The exhalation valve on my well-known name-brand $165 respirator is a thick rubber flap which makes a less than perfect seal so that dust and pollen get into your airway when you breathe in. I had to attach a piece of N95 mask over the exhalation valve to fix that problem on my expensive respirator, but then it steams up fairly quickly. By contrast, the exhalation valve on this BASE CAMP dust mask is a thin and very supple disc about 5/8 inch in diameter, and it forms a perfect seal.You can make sure the valve is seated properly by placing your lips tightly against the seal housing on the inside of the mask and then trying to suck air in. You should get no air whatsoever if your lips are tight against the plastic housing and the seal is properly seated inside. If it isn't properly seated, the housing can be opened by holding the exterior valve housing with one hand while turning the interior housing CCW until it comes apart.Of course, the respirator with full polycarbonate lens offers eye protection too, and filters are available for blocking vapors as well as particles. But if your concern is breathing in fine particles, this BASE CAMP mask in my experience is superior to the expensive respirator because of the latter's "Achilles heel", its exhalation valve. I made sure there was no foreign matter keeping the respirator's valve from closing properly. The valve's imperfect seal was also a cause for concern among the medical profession, according to articles on NIH.govThe bridge of the BASE CAMP dust mask has a clip inside it which you can pinch to help form a good seal against your nose and face. When wearing the BASE CAMP mask, I had no problem with my $12 Pyramex safety glasses (which fit over prescription glasses) steaming up.

For the past year, I have been hearing about nanotechnology that has been used in medications. And, now I am reading about nanotechnology that are being used in masks! I can't believe this! I didn't even notice that these masks use nanotechnology. It even says it in plain sight in their advertisement and on the package. How blind could I be?Some face masks that are made throughout the world contain nanotechnology-derived graphene. Graphene is known as a cause of pulmonary toxicity. What does that mean? Well, if the graphene comes off the mask and into the lungs, it could cause health issues. “Graphene is a strong, very thin material that is used in fabrication, but it can be harmful to lungs when inhaled and can cause long-term health problems,” reported CBC News.NOTE: I DO NOT KNOW IF THESE MASKS CONTAIN OR USE GRAPHENE.But, I would like to know. And, if not graphene, what type of nanotechnology is being used in these masks and how safe is it?Made in China? If had known that, I would not have bought them in the first place.In early November 2021, I emailed Base Camp and this is what I said in that letter:To: Base Camp,Through the Amazon website, I purchased a set of masks from your company, didn't notice in the ad that it said “nanotechnology”. What type of nanotechnology are we talking about? Be specific.Thank you,(Vibrational World)Their response arrived on November 11, 2021. Here is what that email said:(Sender's name removed by VibrationalWorld for privacy reasons) HelloThe nanotechnology used in masks has the following characteristics:1. Nano-linen yarn fabric has better pulling endurance than conventional chaotic chiffon, is not easy to pull silk, is not easy to penetrate the meat, and has a unique coolness, natural feel, and softness.2. The fabric using nanotechnology, the structure surface is covered with a layer of chemical substances, this layer of substance can make the water on the fabric slide directly, so the nano hemp yarn has a waterproof effect, and also has antifouling, oil-proof, antibacterial effects, and comfortable At the same time, hygiene is ensured.3. Good abrasion resistance, high elasticity, soft hand feeling, uniform dyeing, and even silk performance, cooling effect, refreshing and comfortable.SincerelyBASE CAMP Team UPDATE, NOVEMBER 13, 2021Since I did not feel fully satisfied with their last letter, I emailed them again with a new letter:UPDATE: NOVEMBER 17, 2021No response yet.UPDATE: MARCH 4, 2022Still, No response to may last letter. I wonder why? Does anyone know what type of nanotechnology is used in these masks and is it safe?