[powrguy]

outdoort:
Yes I just purchased the lpr-100. I am a weekend welder with limited experience. I think it is fantastic:
- For one you are getting a respirator from a company that produces welders. This is a huge deal for liability and safety concerns. I feel like all of the potential research of mask protection (that would still leave you wondering) is non-existent.
- It fits under my mask without a problem.
- It's very easy to breath through. I cannot stress that enough.
- The filters are cheap enough. the "3m 7502" costs the same price but doesnt come with filters. If you break that down on price... the LPR-100 is actually $15. The filters are $10. Yes, a bit excessive for the filters. My 3M R95 mask is about $5 a pair.

I would rather use the LPR-100 respirator for EVERYTHING. It's much more comfortable and convenient than my 3M R95 mask. It doesn't get in the way like larger masks. I just have to take it off and switch to my larger mask when not welding to ensure I get a good life out of the $10 filters. It's hard though. welding...grinding...welding...grinding...etc. It is a bit of a toss up if you are trying to save the filters and save your time of switching back and forth.

I use the LPR-100, also, under the Digital Elite hood. Just D-I-Y, but got tired of grinding dust up my nose continously without a respirator, and smoke/fumes/etc. when welding, too.