ShawnD wrote:

Pretty sure Swift recommends these in their boats. Sorry I’ve never used one.

https://www.gcioutdoor.com/canoe-seats/sitbacker-canoe-seat/

Oh the older I get the more appealing that looks, I can imagine a nice leisurely paddle in the evening listening to the loons with that at my back.
 

Rats...that's the style that I've found to be a little "iffy" over time.  Maybe I'll look at some different designs of that style.  I've used them before an they help, but they seem to prematurely break down (maybe it's because I'm a bit of an ox).

Thanks for the options, folks.  Perhaps a seat-backer would do just fine for her...

good tip. Thanks!

I've used my GCI Sitbacker occasionally, and made a point of using it today on a day-paddle to our local reservoir. I chanced upon one as a throw-in when I made a deal on some other used gear on Kijiji. I don't particularly like this sort of seat because I don't think they're conducive to supporting the torso (abdominals) during serious single or double-blade paddling. Leaning back on these things compromises efficient paddling strokes. That, and they're too heavy to tote along on BC trips. They ARE nice, though, for restful in-boat stops for snacks, for fishing, and for lazing about in the boat. They buckle to canoe seats easily and don't jiggle around too much. The top metal bar likes to remind your back that it's there, but wearing your PFD will soften up the contact point.

I much prefer using back bands similar to those pictured in one of the above responses. 1) They're light  
2) they're a nice support for snacking, fishing, and lazing in,  and 3)  if they're a good fit with your back they can be a good support when double-blading. I don't like them when single blading as I'm bothered by the straps at elbow height. When single-blading and paddling to get somewhere I fold the back band (actually, a hanging kayak seat in my case) down, and just use it as a thin bum pad.

Hope these observations help.