Surgical StyleLeonche Face Mask are crafted by hand in the USA. 100% Cotton - 2 layers including filter, non-medical grade Washable and Reusable Adjustable ear band - loosen/tighten elastic by tying a knot Two sizes available - Adult & Child sizes fit most. When worn properly can mask from dust, pollen, and small air particles. Not Anti-Viral. Please allow up to 7 days for production before shipping. Please Note: Due to the nature of this item we will not be able to accept returns or exchanges. Please contact us if you have a problem.