The KN95 Respiratory Mask is a disposable mask that is efficient at capturing salt particles at a flow rate of 85L/minute. It filters a 95% reduction of specific aerosols in the air. Features 5 layers of filtering including PP cotton, electrostatic adsorption melt-blown filter, and non-woven skin. These masks can be used for various environments such as pest control operation, hospitals, food processing, residential areas, and hotels.
Individually wrapped in the box, material seems solid, but only has ear loops for fastening so I don't think they are tight enough to form a proper seal. Limited research says ear loops do not qualify to meet either N95 or KN95 standard.
Brand name of masks? What country are they made in? Adequate protection when spraying Roundup?
The brand is subject to change based on availability on the KN95 Respiratory Masks. They are manufactured in China. Please check the version of RoundUp you have for the manufacturer's direction on what personal protective equipment or PPE is required as this will vary from product to product but it is listed on the product label.