These Swiss Mobility masks for kids are washable, breathable and reusable, and include an interior pocket where an anti-dust filter can be inserted (TAC1140SM - sold separately). They are made of 30% cotton and 70% polyester for easy breathing, and have an adjustable elastic strap as well as a metal string at nose level for a better adjustment. Non-medical use. Machine wash at a gentle cycle and hang to dry. Wash before use. Wash hands before wearing mask and after removing it. Keep mask in a clean, contained space when not using it. Each mask is made up of 3 protection layers, but 5 additional layers can be added by purchasing a filter (SKU 63325007) for maximum protection. Children 8 years and younger must be assisted by an adult to adjust the mask properly. This product meets airline requirements. Not for kids 2 years and under. Pack of 2 masks with fun prints. Universal kid size. White/pink.