^^^^^^^^^^^^^^^^^^^^^looks like you enjoy spreading unfounded bullshit.
only thing i could find to partly substantiate what you claim here was one random study (20 subjects) that looked at wearing n95 masks (which make a seal) for long periods by health care workers.
please provide evidence that wearing an ordinary cloth mask can cause hypercapnia.
NO EVIDENCE OF HYPERCAPNIA WEARING ANY KIND OF MASK!
Bullseye!! It's Shaggy spreading untruths again.