The stock Caterham gray cloth seats are very comfortable. Because they are mounted on sliders, they have fore/aft adjustment so your wife can position them to her liking. Rake of the seat back is not adjustable but I found it to be perfect. I added a gray lumbar pillow from Auto-zone and found the seats to be the best part of doing long cruises/trips in my car. They are grippy as well, so at the track your butt doesn't slide around as much as on leather. And they are very light weight, maybe 10 lbs each, maybe less. And of course, they fit perfectly, no fetteling needed. The stock fiberglass and composite seats are nice but not nearly as comfortable, I tried all three versions. I have hated the bench seats on the Cats I have driven that were so equipped: they are too erect, too far from the pedals and steering wheel, and the seat cushion seems to be thicker, so you sit higher. I really hated them (tho not as much as the stock seats in my Birkin, which would likely fit a Caterham).