Features: 1. The adjustable dust-proof nose clip is flexible and fits your face better. Suitable for motorcycles, bicycles, racing cars and skiing. 2. With ergonomic design, the bicycle mask can be adjusted to suit most people. 3. Double breathing valve, small air resistance, breathing more smoothly. Improve air circulation, helping to reduce moisture build-up inside the mask. 4. Suitable for outdoor activities such as home decoration, running, cycling, hiking, skiing, woodworking, etc. This anti-pollen mask can also be used for protection against haze and dust. 5. Can be washed, but do not rub. Can be used again after natural drying. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material: Neoprene, mesh Size: 31 * 15CM Color/Style: As the picture shown includes: choice 1: 1 x Dual Air Vent Mask chocie 2: 1 x Mask Replacement chocie 3: 2 x Mask Replacement chocie 4: 5 x Mask Replacement chocie 5: 10 x Mask Replacement