Honeywell North Safety 770030L 7700 Series Silicone Half Mask Respirator Large (1 EA) Mask Only

This is an early-stage, tentative review, as I have not had much chance to test this item out in the real world. But I like to explain things, so here are first impressions.First off, I have a big head, like a 7 and 3/4 hat size, so I instinctively bought a Large. I feel it was the right decision, though a medium may have worked. The item box included head-measurement diagrams on the exterior. This would have helped for choosing a size in a brick-and-mortar store. I wish Amazon included this diagram in the description. The website is northsafety.com but none of the browsers I tried just now (to provide a link to the chart) would even connect. Go figure.For head measuring, it's mostly about the distance between your chin and the bridge of your nose at the very top.Above 12.5cm, you're a definite L. Below 10cm, a definite S. Between 10cm and 12.5cm lurk the S/M, M and M/L folks.The feature that fine-tunes this respirator to your face is that there are four very adjustable straps on each device, so there's tons of opportunity and leeway for adjusting and getting a precise and tailored fit. I assume most respirators in this price range have such adjustable straps but this is clearly a crucial, positive feature.So, for the scull-cap, the right and left side straps can be adjusted.And for the clasp that goes around the back of your neck, the right and left side straps can be adjusted. The straps are thick and sturdy, easy to adjust and can be repeatedly readjusted, if that becomes necessary.Once adjusted properly, you just place the scull-cap over the top of your head, pull the neck straps around the back and secure them. I found it took only three or four tries to be able to feel my way around and connect the neck clasp without anyone else's help, or any fuss. It's obviously designed for taking on and off again without any assistance. These straps and how they work get 5 stars from me.The triangle on your face: it is made of silicone. Not just the contact parts, the entire thing. It is soft and squishy and this is why people like it. It might stick and sweat but it does not abrade your skin. So if you're going to wear this item for 8 hours, this is definitely the material you want rubbing against your face.As for the weight, I've not worn it long enough to comment. And everyone's nose bridge varies, so the pressure and possible discomfort there will vary too.With the filters, yes, it's much heavier than, say, an N95 Aura from 3M. As other commenters note, muffled speech will be a problem.But once adjusted to my face, which did take at least a half an hour of trial and error, it felt comfortable on my head and seemed to form a proper seal.Again, this is my first impression out of the box. I hope to come back later to comment on use in the wild.This post relates to my use for respiratory virus protection.