Activated Charcoal Filter - Outdoor Sports Anti Dust Mask Mouth Windproof Warmth Face Mask with Air Pollution Filter for Bicycle Motorcycle Riding Ski Ice Fishing Cross Country Hunting Dustproof, windproof, lining with high adsorption material and activated carbon filter. Face Shape Design, Nose portion of an aluminum sheet secured to prevent slipping. Ventilation holes on mouth, soft and comfortable to wear. One size fits most and Unisex! Suitable for doing activities like biking, riding, snowboarding, or climbing.