Originally Posted by platbrownguy

But if you're a side or stomach sleeper and not of slender build, I think the J seat has more wiggle room where it counts -- I find that in the F seat, I'm weirdly constricted on both sides by the vertical barriers and it is very difficult for me to find a comfortable position to sleep, even though my feet have ample room. In the J seat, I can bend my knees in a natural position and because of the vacant space under the desk area, I have ample room there, and I still have enough room not to be unhappy with my feet.
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