This comfortable and reusable face mask has a HeiQ Viroblock antimicrobial treatment for added protection. Made with a brushed and quilted polyester stretch knit fabric, the thermo-formed three-layer construction provides a snug, contoured fit. It offers full nose and mouth coverage, with elasticated ear loops to keep the mask securely in place.The mask uses HeiQ Viroblock NPJ03 to protect it from microbes and germs. Viroblock is a unique combination of HeiQ’s registered silver technology and vesicle technology which works as a booster to enable quick antimicrobial effect of the silver.Size guide: take a ruler and measure from the base of your chin to the bridge of your nose. Up to 12 cm = small, 12cm or higher = regular.