Washable, reusable and approved mask made of 3 layers of certified organic fabrics providing triple protection. FEATURES    -Elastic soft bands for easy wearing and adjusting    -Organic cotton, water-repellent and antibacterial.    - Built-in filter    - Natural fabrics     -Maintains its properties with up to 40 washes.    -Iron at 150º and the mask will be like the first day.  Sizes Adult Standard (S): 18cm x 15cm ( 7" x 5.9") Junior Standard XS): 15,5cm x 14,5cm ( 6.1" x 5.7")