Durable and stretchable: our flat cord bands are made of polyester fiber, coming with nice elasticity, soft to touch and won't scratch your skin, they are also durable for you to apply a long time Nice performance: the stretchy sewing straps are featured with nice ductility, they are stretchy that can be easily restored without deformation after stretching, help you to get a comfortable wearing experience Adjustable buckle design: our ear loop anti-slip elastic bands brings you practical buckles, which can meet your different tightness needs, help you to hold the face protector securely, won't too loose or tight Size information: each sewing strap band measures approx. 10 cm/ 4 inches in length after folding, and 0.5 cm/ 0.2 inch in width, the proper size will give you much convenience to sew or trim, and get the practical and delicate crafts You will get: the package provides you 250 pieces/ 125 pairs of black or 300 pieces/ 150 pairs Black and White ( 75 Pairs each ) flat elastic cord bands, which will enough for you to make your own covers, also be your necessary supplies to DIY, they are also suitable for other craft projects