Features 100% microfiber polyester fiber, soft and comfortable, breathable. The super-elastic fabric makes our neck brace suitable for most head types.If you are unsure of the size, please email us. We offer flexible returns and exchanges. Your satisfaction is the driving force of our service. I hope you enjoy your shopping!Note: 1. Please understand there may be 1-2 cm deviation exist.2. Due to the lighting and monitors, there are slight difference between the picture and the real Item.SpecificationsStyle: Outdoor Mask Material: Microfiber Polyester Size: One size Color: Gray / Dark gray / Blue / Pink Design: Pluggable filter Features: Sunscreen, dust-proof, filter dustPackage Contents 1 * Face Cover Bandanas or 2 * Face Cover Bandanas + 10 * Mask FilterPromise If the product has any quality problems, please feel free to contact us, we will help you solve the problem as quickly as possible.