100% Satisfaction - If for any reason you are unhappy with our product, please do not hesitate to contact us. We take full ownership and responsibility for the quality of our products and will do our best to solve your problem quickly and efficiently!. Universal Elastic Style Ear Hooks– Soft, comfortable ear bands prevent headaches when wearing for long periods of time and allow for easy modifications when fitting to both adults and small children. Convenient one size fits all styling safeguards everyone—perfect for families, office & warehouse workers & more. Easy to Use – Our protective covers are disposable and single use. Lightweight provides comfort and easy breathing while you’re at work, grocery store, or running necessary errands. Just slip the elastic bands over your ears and conform metal nose guard to create a light seal around your face. Should not be reusable. Apply new one every 12 - 24 hours for best protection to ensure moisture from breathe doesn’t dampen it. a filtering layer, say bye to particles from 0.3 to 1.0 pm. Inner layer is a water absorbing layer, which can absorb the moisture from the breath of the wearer, avoid the filtering layer from getting wet. Breathable & Soft & Comfortable – BLScode masks with the inner skin-friendly non-woven fabric is as soft as intimate clothing, light and breathable without stimulation.