Package include: Only 60pcs carbon filters for reusable. Does not include mask or neck gaiter. The picture just shows how to use the PM2.5 air mask filtering. Multi ways to wear: bandana, neck warmer, balaclava, beanie, wristband, hairband, neck gaiter, skull cap, sweatband, winter mask, tube scarf or other else. Bandanas: 15*9.5. Filter: 4.9*3.1. This bandana is super stretchy and breathable, so it accommodates most head sizes and nice to wear in every season. 5 layers activated carbon filter can protect you from dust, allergies, smoke, pollution, ash, pollen and cold weather. It’s not only suitable for this neck gaiter but also other mask which have insert. Wide application: suitable for outdoor activities, such as fishing, cycling, hiking, camping, motorcycling, hunting, yoga,Travel, and other kinds of sports. Easy to breath and easy to carry.