My carry on backpack, which is exactly the right size to fit under the economy seat in front, also handily doubles as a footrest/legrest.
Originally Posted by Helena Handbaskets
I've flown on a few planes (a DL 777 I remember specifically) with footrests in economy that fold down from the seat in front. Modest footrests, to be sure, but they add a lot of comfort for very little added weight or complexity. I wonder why they're not standard.
They can be a right pain in the neck - or more accurately, shins - because of where they are. They can stop you stretching your feet all the way forward under the seat in front because your shins end up banging on the footrest, even if it's only an inch or so lower than the lower edge of the seat itself.