This is not a medical device or personal protection device Breathable Polyester Quick wicking and anti bacterial properties Water repellent 2 Ply Reusable Masks with earloops and sewn on neck strap Printable Certified to standard EN 13274-7 and AFNOR S76-001 for filtration and permeability Washable at 60° C Wash before first use Retains efficiency even after 20 washes XS for children 6 to 10 years; S/M for teens and slim adults; L/XL for most adults; XXL+ for larger adults