I tried some of this nose filters and no one works the idea is great small and almost invisible but it seems hard to breath to me, especially if you doing something walking working running or even sitting you spend all the time adjusting ,bending, shaping the device I used to work in construction and I like this disposable respirators• And also keep some of the moisture especially in the winter    http://solutions.3m.com/wps/portal/3M/en_US/GovernmentSolutions/Home/ProductInformation/ProductCatalog/~/3M-Particulate-Respirator-8210Plus-N95-160-Case?N=5928575+4294933529&rt=d

Edited 1 time by Nino Feb 11 15 4:27 AM.