SIZING & FITTING GUIDE
The RZ® M2.5 Mesh is a slightly different take on our popular M2 Mesh. Like all RZ Masks®, it features our standard F1 filters, blocking 99.9% of particulates down to .1 micron in size!
Both the M2 and M2.5 feature the same highly breathable mesh fabric construction that helps to keep you cool on even the hottest summer days. However, rather than using the single strap closure of the M2, the M2.5 opts for a flexible dual elastic strap system with quick-release buckles. This adds an extra touch of security and comfort, making it ideal for exercise and movement, or when you must wear your mask for an extended time.
M2.5 FEATURES:
+ Best-in-class filtration and comfort with 360-degree seal
+ Washable and Reusable
+ Breathable mesh material – cool and comfortable
+ Dual elastic strap closure system is flexible and super secure
+ F1 Filters remove up to 99.9% of particulates down to .1 micron in size
+ Dual one-way discharge valves reduce moisture inside the mask
+ Adjustable nose clip eliminates any fogging of your glasses
+ Filter performance independently proven by world-renowned Nelson Laboratories
+ Three sizes for personalized fit – Medium, Large, Extra Large
EACH M2.5 MESH MASK INCLUDES:
+ 1 RZ Mask®
+ 2 F1 Filters
+ 1 Storage bag
MAKE SURE YOUR MASK & FILTER SIZES MATCH:
Medium Mask = Medium Filter
Large Mask = Large Filter
X-Large Mask = X-Large Filter
HOW LONG DOES AN RZ FILTER LAST?
The life expectancy of the RZ Filter depends on many variables, such as; particulate exposure density, particulate exposure duration, and user breathing rate. With that said, below are our general guidelines – as the user will have the final call given your exposure.
+ 20-30+ hours of continuous use in heavy dust exposure to things such as; grain bins, off-roading, construction/demolition, etc.
+ 30-40+ hours of continuous use in light dust exposure to things such as; grain bins, off-roading, construction/demolition, etc.
+ 50-60+ hours of continuous use when protecting against allergens, pollutants, odors, etc.
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Mask used when woodworking
The medium mask just fits. I wonder if a large would’ve been better. Anyhow the mask works very well, it takes a little time to get used to it. I use it when sanding wood and finishing boxes and bowls. I believe the RZ mask will help preserve my heath for years to come.

2.5 is nice
The double strap makes all the difference. Mask doesn't feel like it's falling down, stays in contact with face!

Nearly Perfect
I really like the proper feeling fit you can get with this thing in comparison to the M2. I would like a different buckle for the straps though to make for quicker, easier adjustments.

A backup was bought
I like so much I bought it twice! 2nd is for a backup to always have in the car.

So far, seems to fit great!
The first mask I ordered a few years ago was very uncomfortable to wear with only the one strap falling behind my neck. I ordered this one due to its having the two straps, which made all the difference the one day I wore it! These are the only masks I can halfway breath through, as I really cannot wear a mask. I'd purchased the filters that you can breath easier through for the prior mask and put one of those in this new one.