actually there are many designs of kn95 and there are also many fake designs.
this is why many People are still using surgical mask as it was more safer and cheaper.
I only use some surgical as long as with tissue inside.
Speaking of tissue, I saw a life hack which claims to prolong the reusability of a mask by inserting a piece of tissue between your mouth and the mask.
Yeah i also read that hack mate,but what i am doing to prolong my mask?i am spraying 70% alcohol every time i go home or when i report in the office,spraying the mask thoroughly back and front to make sure that the Virus is dead.
well this is my own style since i don't trust washable mask .