When deciding how long you can wear a particulate respirator. 3M 1860S NIOSH Surgical N95 Mask Small Sized 1860s N95 mask here's why you should consider investing in an N95 mask and buy 3M N95 masks online before it's too late! Harley L-188 N95 Mask NIOSH Approved Harley commodity N95 l-188 this will help your next project go as smoothly as possible. That's one of the most common questions plaguing Canadian citizens these days. One of the best ways to do this is by using N95 face masks. You might use your mask as quickly as you're revealed to irritants.