Check the listing for details. Child Size Cotton Face Covers: Valve Wire Nose Bridge Adjustable Loop 10 Filters. Condition: New. Listed at 5.99 USD. Child Size Cotton Face Cover with Breathing Valve, Wire Nose Bridge, Adjustable Ear Loops and Ten (10) PM2.5 Carbon Filters INCLUDED: One Face Cover and Ten (10) Filters. FACE COVER: These washable, reusable face covers are made from two layers of tightly woven 100% Cotton. There is a wire in the nose bridge for a smooth fit and a pocket on the inside to insert a PM2.5 Carbon Filter (2 Filters included). Breathable layers of materials allow you to wear the mask comfortably for longer periods of time FILTERS: size: 4" x 2.75" Activated Carbon Filter Replaceable Filter. First layer of spun bound cloth filters micron-level dust; Second layer filters industrial pollutants, automobile exhaust, second-hand smoke, and pollen allergens. Third layer of activated carbon cloth filters micron-level dust; Fourth layer offers filter density for smaller material. Fifth layer of spun bond cloth filters out all kinds of harmful substances. Replace filters weekly recommended. PERFECT FIT Our Face Covers fits snugly around the nose over the chin, and around cheeks reducing leakage. Featuring build in adjustable nose wire for a smooth fit. Adjustable Elastic Ear loops provide a comfortable and secure fit. REUSABLE AND WASHABLE Please wash before use. Wash by hand with warm water and soap then hung up to dry.