The BREATHE Adult Face Mask in Grey is an Organic Cotton BREATHE Face Mask. Comes with an optional and replaceable PM2.5 Activated Carbon Filter. The replaceable PM2.5 FILTER cleans the air you breathe without trapping any moisture. The activated carbon filter is removable and fits into an inner pouch on the inside of the face mask. This means you can remove the filter and wash your mask like any garment. Machine Washable to 60 Degrees (ALWAYS remove filter before washing mask). Adjustable ear straps to fit all sizes. The BREATHE Mask follows all WHO guidelines. Organic cotton face mask for adults. Adjustable ear straps to fit all sizes. Fabric Composition: 100% Organic Cotton Outer Face Fabric, Non-Woven Activated Carbon Particulate Filter, 100% Organic Cotton Lining Inner Fabric All BREATHE face masks have an integral inner pouch to house the PM2.5 Filter We recommend changing the filter every 16-24 Hours of continuous use, or once a week for occasional use