1 high-quality medical grade silicone 2 types: large, medium and small 3 suitable for adult and children 4 dustproof mask Productsilicone oxygen maskMaterialsilicone PaymentT/TMOQ500 pcsDescription Material: made of medical grade siliconeThree Sizes: for infant,youth and adultLogos: logos could be made by printed, debossed and embossedEnvironment-friendly, Flexible, Durable, Suitable and So onThe ...