Features: 1.fashionable design, light weight, aseptic, environmental friendly PE flexible material, self-cleaning, high temperature disinfection, unlimited reuse, no allergy, perfect fit to your head, maximum comfort, surround design, adjustable belt, tasteless, long service life, etc. 2. Extensive compatibility - various masks with two-point connection disposable masks, dust masks, etc. 3. Washable and durable - the headband is made of durable PP flexible material, which can be repeatedly cleaned, bent, not worn, curled, dropped or other types of degradation. 4. Relieve the pressure of long-term wearing of mask on ears Specifications: Product size: 16cm * 1.7cm * 1.2cm Adjustable mode: 3 modes Package Included: Depend on which choice you ordered. 4Pcs x Mask buckles (Black x 1,White x 1,Pink x 1,Blue x 1) or 30Pcs x Mask Buckles (Colors depends on your choice) or 50Pcs x Mask Buckles (Colors depends on your choice) or 100Pcs x Mask Buckles (Colors depends on your choice)