too much plastic impedes breathing [SEP] great premise but the structure of this frame contains too much plastic which blocks quite a noticeable amount of air compromising the breathability of a mask i suspect all of the available plastic brackets are similarly problematic i gave it an extra star for its very reasonable price my intent is to see how much of the frames structure i can retain while cutting away as much as possible of the plastic to see whether i can improve the breathability of the mask while using this frame inside it