Keep yourselves safe! Face Mask Features: 1. Pure cotton fabric and activated carbon filter layer. And it features the unique ventilation design, excellent breath-ability and ergonomic design. 2. The mask features an adjustable nose bridge and is suitable for a variety of faces, comfortable to wear. 3. The mask can isolate dust, particles, gas, pollution, and smoke. 4. Suitable for cycling, running, cycling, hiking, skiing, woodworking and other outdoor activities. 5. Can be cleaned and reused with more filter paper. Specifications: Material: Cotton Size: 9 x 5 Please hand wash mask with soap and water before wearing and in between uses. Remove the filter before doing so. Even though it arrives from a clean wearhouse, you can never be too certain these days. For sanitation reasons, we don't accept returns. Thank you for understanding.