<https://www.iyapmall.com/product/tokova-sleek-designer-face-mask/#product>
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"The Tokova Sleek Designer Face Mask is made of soft lightweightSilicone with adjustable ear loop straps and incorporates a cool air flowexhalation valve to release your hot, humid exhaled breath quickly. The Tokova Sleekcan be sterilized in hot water or steam by raising the temperature high enoughto kill any bacteria left over after washing. Each mask comes with a Four paneldisposable KN95 particulate respirator with a metal nose piece to ensure a snugfit which helps provide quality, reliable, and convenient respiratoryprotection. Filters should be replaced every 3 to 5 days."
<https://www.iyapmall.com/product/tokova-sleek-designer-face-mask/>