Officially certified masks are what you and your family should be looking for to protect yourselves from harmful particles and safeguard your health. We understand the difficulty in finding such masks, as purchasing uncertified ones would be a waste of money since they cannot effectively shield you from ultra-fine particles.

Fortunately, the Korean certification ministry is one of the world's most stringent certification authorities, and the official certification report for HAPPYDAY disposable masks is provided on this product detail page. The KF94 grade, a Korean standard, can block more than 94% of fine dust and other harmful particles.

In fact, the largest and most trusted newspaper in the United States has mentioned Happy Day Mask as a product that meets all the necessary requirements, which can be confirmed by searching "Happy Day masks met all of the requirements KF94" on various search engines.

Designed for those who always make wise purchases, the choice is yours. Happy Day masks will provide you and your family with a sense of safety and security for your health. Composed of 4-layer filters, these KF94 masks effectively filter out impurities in the air while facilitating easy breathing.

A set of 25 individually packaged masks in a large size is available. The measurements are as follows: Length: 7.95 inches, Width (Folded): 3 inches, and Width (Unfolded): 6.69 inches.

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