From what I've read/heard from others looking for 'comfortweave' reproduction seat covers, the material they sell today is 'stamped' to 'appear' close to the comfortweave look, but does not 'breathe' ... it's flat vinyl with a pattern stamped/heated into it...
The original 'comfortweave' was just that ... woven.. and it 'breathed'... thus it was comfortable...