HIGH-ELASTIC AND COMFORTABLE: Designed with elastic material to prevent feeling of oppression, 3D three-dimensional structure make masks perfectly fits any shape of face. Gentle wearing comfort that will not hurt your ears even if you wear it for a long time. WASHABLE AND REUSABLE: Mouth mask are not disposable but are eco-friendly masks that can be washed and used repeatedly. It has a shape memory effect that does not lose its shape even after repeated washing, and is more cost-effective than disposable masks. Face Masks: Made of sponge material, keep pollutants out while offering comfort thanks to the built-in exhalation valves and soft and stretchy elastic loops. FILTER THE AIR YOU BREATHE IN: Dust mask with breathing valve and filter system makes the emission of heat and carbon dioxide easier, the breathing is smooth, keep your face dry and fresh, the glasses will not fog. Face masks can filter small particles from air and protect you from fog, smog, dust, smells, vehicle exhaust, air pollution. These masks are soft, and breathable. The breathing valve helps for better breathing. Package content: 2 Pack Mask with 2 Filters