DESCRIPTION Masks are a necessary and mandatory complement for anyone, both when working or during their free time, and of course practicing their favorite sport. At OTSO we have developed high quality masks with the designs that characterize us, unique and daring. MAIN FEATURES Made entirely in the European Union They have three layers: The first, which is in contact with the skin, is cotton, fluffy on the inside to avoid irritation, and with a great capacity for filtering bacteria and microbes. The second is made of polypropylene, the most widely used fabric today for the manufacture of masks, with a specific micro-filtration structure and a “water repellent” membrane system. And the third one is made of polyester for high quality sublimation.