Breathable and adjustable. I wear these at my job in the Emergency Room; they have held up well so far. I was breathing heavy through the surgical masks and N-95s provided by my workplace. This KF94 was much lighter, easier to breathe through, and I feel less tired at the end of each shift.
Bluna face masks are comfortable and they do the trick of protecting us. KN95 and N95 masks fit too tightly, and they make it hard for me to breathe. I believe the ease of breathing with this KF94 mask is due to the large air space of the Bluna mask.
I love this mask except the strings that make it adjustable are very weak and often break meaning it could break after 1 use!
I was a bit nervous buying a new mask because I'd only worn a very specific brand of cloth mask back in 2020 because of sensory issues. Those actually became too uncomfortable for me. This one is more comfortable by far. I find that my head is kinda big but I don't have a "man" sized face. It is slightly big on my face but the adjustable straps actually work for that. The ear loops feel light bc they are so thin. Sometimes I fold the bottom part in on itself and it seems to have a good seal but maybe you aren't supposed to do that. Anyways the mask community on Reddit had these on their recommended list and I will 100% buy these again.