3M 7100155156 - You often want respiratory relief when spraying varnishes or staining a deck. the 3M 65021 household multi-purpose respirator helps filter out the particles and certain odors you don't want to inhale, while providing comfort with adjustable features. the cartridges sit swept back for a larger field of view, and the reUSAble design can last from one project to the next. give yourself the 3M household multi-purpose respirator 65021 for projects on your to-do list.