Features: High-quality material: Made of high-quality polyester, nylon material, soft and skin-friendly, high elasticity, not easy to break, reusable, durable. Professional mask headband: The comfortable design in all direction can fix the mask, better improve the effect of breathing, and help patients sleep more comfortably. Easy to use: Just connect the four points with the face cover to adjust it to a suitable position and fix it. Comfortable to wear: The structure is simple and reasonable, the surfaces is highly adaptable, and it can be used with confidences without scratching or irritating the skin. Satisfactory service: If you have any questions, please contact us in time. We will provide you with better products and services. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: polyester, nylon Size: 10*10*5cm Package List: 1 x Replacement Head Strap