I bought a 3M 6000 series half face mask with 3M 2091 P100 Particulate filters a few months ago and like it. I find it fairly comfortable, the mask is silicone I believe. http://www.amazon.com/3M-Series-Facepiece-Respirator-Assemblies/dp/B000FTEDMM/ref=sr_1_1?s=hi&ie=UTF8&qid=1390410861&sr=1-1&keywords=3M+5000+Series+respirators