3-Ply Construction: The mask consists of three layers of high-quality nonwoven materials, gentle to skin: the outer and inner layers are made of polypropylene spun-bond nonwoven fabric and the middle layer is made of polypropylene melt-blown nonwoven fabric. The three-layer design provides both comforts and wearability for indoor and outdoor activities while remaining lightweight and breathable experiences Comfortable Ear-loops: Our masks are equipped with elastic ear loops built with a polyester, nylon, and spandex blend to relieve pressure on ears and allow for extended use Sturdy Nose Clip: Our adjustable nose clip consists of a metal wire covered in plastic designed to help the mask tightly form to the nose-bridge creating the most comfortable fit and a tight seal while also helping to reduce eyeglass fog Easy to use, convenient to distribute, safe to store: One-size-fit-the-most design with adjustability to different users to provide full coverage of nose, mouth and chin; 50pcs of masks are contained in the box, and each 10 pcs are individually wrapped and sealed for convenience, travel and distribution Using Scenarios: Suitable for environment such as household, office, factories, warehouse, school, universities, campus, library, shopping mall, groceries, restaurants, cafe, gym, spa, saloon, convention center, stadiums, for both indoor and outdoor activities such as family gathering, in-person tutoring, parties, day-to-day work, office hour, workout, sports events, concert, tradeshow, campaign, social events, etc. Storage Instructions: Store in a cool, dry, clean place away from ?re and contamination; Store between -20? and 38?(-4F and 100F) with relative humidity below 80?; If the mask becomes damaged, soiled, or breathing becomes di?cult, leave the contaminated area and replace and re?t with a new mask