100% microfiber polyester. ??Built-in activated carbon filter??You got 12pcs filters. Activated Carbon Neck Gaiter, filtrating exhaust gas PM2.5. The dustproof Breathable Scarf filters out 99% of exhaust, dust, chemicals, particles, smoke and fumes. Lightweight and breathable: Moisture wicking fabric transfers heat and moisture from the outside of your body and seamless turban to keep you cool. Quick-drying fabric technology allows your mask turban to dry in minutes instead of hours. Can also be compared to avoid ultraviolet and sun burns. Multi-functional design: a variety of wearing methods, scarves, wristbands, masks, hair bands, face towels, seamless masks, headbands, etc. boysBest fit: The neck brace is made of super soft and elastic fabric, suitable for any group of people, , girls, the elderly and children can use.