The Micro Face Mask is a premium quality face mask with FOUR layers of protective polypropylene to help keep out droplets, germs, pollution, and allergens. The Micro is the perfect mask for school and travel for kids ages 2-4 years old. The Micro is manufactured in the USA from imported raw materials in an ISO 9001:2015 certified facility for maximum quality control and is FDA listed as product code QKR. The Micro has undergone the same 3rd-party testing as out other masks, in a certified laboratory. Due to small size of this product, testing was conducted on a flat 175mm x 240mm sheet of the imprinted mask design, prior to the cut. These tests were performed under ASTM F2100 standards of Particulate and Bacterial Filtration. Testing confirmed a PFE > 99% and a BFE > 99% as well. This face mask for toddlers can be worn easily with our Little Lives PPE® Face Shield for superior protection.