Blue Bear Face Masks are made to the highest non-medical standards, filtering 99.5% of particulate matter according to independent lab tests. Blue Bear Certified Authentic Face Masks are in stock and shipping from the USA and come with a 100% Satisfaction Guarantee - if you are not satisfied, we will refund or replace your order. Our masks are designed for maximum comfort and protection and feature an adjustable metal nose-bridge piece for a flexible and customizable fit.