100% Polyester ? 1??POLYESTER MATERIAL:100% polyester, breathable, stretchy, soft. It can keep you comfortable in any position. And it has exceptional absorbing and wicking features to keep you dry all day. ? 2??ONE SIZE FITS MOST : face mask bandanas feature a super stretchy fabric that accommodates most head sizes (adults & kids). ? 3??MULTIPURPOSE :Suitable for walking, running, hiking, biking, riding, fishing and yoga etc; Convenience to carry on, you could fold it and put in your pocket or your travel bag or just wear as wristband. ? 4??COMFORTABLE FUNCTIONAL FABRIC:You are the unique one when you wearing this. Fabric is 4-way stretch, It’s very soft and close to your skin. No worry about sweating. Can draw sweat away from your face and dry quickly, UV-Proof, Dust-Proof, Sand-Proof, Windproof. Wear it as a face mask to protect your face get burned from sun rays directly Also they help keep your nose and mouth clean from breathing dust. ? 5??WARRANTY: We offer a worry-free lifetime warranty and friendly customer service. You will be able to use the Seamless Face Mask Bandanas several times to determine if they are right for you. If you are not completely happy with the product, you can either receive a full refund or a replacement product easily.