Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Awesome quality, great price; peace of mind

far lighter and less bulky than standard issue DoD gas masks.These are brand new items.Makes a airtight, easily confirmable seal on your face.Cannisters (Filters) work very well.Drinking tube works well.Good viz thru generous eyepieces.Some newbie whined that you cant wear these with glasses. Go to the friggin optometrist and order some athletic glasses or inserts (look like old english Charles Dickens spectacles) and prop them up inside the mask. Duh.Bottom Line: when a hostile force is tear gassing your home, or a chemical or terror event renders the air in your area suspect, these are the stuff.Get extra Filters, as these type will age and lose effectiveness over time once opened up.