Custom face masks. Each mask is double thickness. Every mask contains a small pouch which fits a PM 2.5 filter that helps to filter out small dust particles and water droplets. Two are included with each mask but masks can be worn without filters. The mask itself is reusable and washable (filters are not washable or reusable). Elastic ear loops are adjustable with plastic fixtures to help create a tight and firm fitting to the face. Ear looks vary in colour and will be either black or white. PLEASE NOTE THAT THESE ARE NOT MEDICAL MASKS AND SHOULD NOT BE USED AS AN ALTERNATIVE TO MEDICAL MASKS. DUE TO HEALTH AND SAFETY WE CANNOT ACCEPT RETURNS OF THESE MASKS. Adult Dimensions - Mask Size: 11.5cm x 17.5cm, Filter Size: 8.5 x 12cm Child Dimensions - Mask Size: 10cm x 15cm (approx). Masks are cut by hand not machine and so some minor variation is normal.