Good protection for : pollution, allergies, travel, sensitive lungs, dusty outdoor work. Made of coton for easy breathing. Interior pocket to insert filter. Metal string at nose level for better adjustment. Adjustable elastic strap for better fit. Washable and reusable. Non-Medical use. Wash before first use. Pack of 2 masks. 1 filter per pack. Adult size. Filters sold separately. Assorted colours (no specific colours can be selected). Other colours or customization available as special order (delivery 20 business days).