THREE LAYER CONSTRUCTION. SOFT & BREATHABLE FABRIC. WASHABLE & REUSABLE. ONE SIZE FITS MOST ADULTS. ALL SALES FINAL - NO RETURNS. NOT BE USED IN ANY SURGICAL SETTING OR WHERE SIGNIFICANT EXPOSURE TO LIQUID, BODILY OR OTHER HAZARDOUS FLUIDS, MAY BE EXPECTED; IN A CLINICAL SETTING WHERE THE INFECTION RISK LEVEL THROUGH INHALATION EXPOSURE IS HIGH; OR IN THE PRESENCE OF A HIGH-INTENSITY HEAT SOURCE OR FLAMMABLE GAS. NO WARRANTIES THAT THE MASK PREVENTS INFECTION OR THE TRANSMISSION OF VIRUSES. COMPLIES WITH FDA, PROP 65. 7.25" W X 4.9375" H