DescriptionManufactured with the purpose of durability, this product would spend long period of time with you. Lightweight, reasonable size, easy and convenient to carry and store. In an emergency, it can be used to provide oxygen from an oxygen tank to a patient to protect life.Features- Color: Sky blue.- Material: Silicone. - Size: 180.00X11.00X9.00cm/70.74X4.32X3.54in.- Oxygen mask can cover the nose and mouth (mouth mask) or the entire face (full mask). - Mask is tender, transparent, odorless, patient comfort is strong.- Check to avoid carbon dioxide retention.- Lightweight elastic strap for efficient and comfortable use.- Perfect for high altitude, high altitude, civil aviation, and clinical medicine, home etc. - Made of plastic and string materials, practical and safe.