The Naso mask is Non-Washable. Anti-pollution mask designed with lightweight and smooth fabric with 5 layer filtration based nano technology. CLI & ITS lab-tested anti-pollution face cover. Offers more than 80 hours protection against PM 2.5 & PM 10, road dust, vehicle emissions, industry firework smoke and air pollution. Made up of ultra-smooth fabric with a comfortable loop and self-adjusting straps. Soft cotton material is smooth on the skin and easy to breathe through. This stylish and trendy mask with inbuilt clasp and loop provides a comfortable fitting for both men and women. It Provides pure breathing experience while cycling, running, travelling, shopping. Can be worn for 80 hours straight without losing it’s ability to filter the air you breathe.