Active fit is the plastic backed version. The plastic is soft to the touch but quite thin, nevertheless both varieties are equally great. As with other diapers which are breathable, the Tenas sag after a couple of wettings so a couple of adjustment to the fit is necessary while it’s getting heavier as with other cotton feel diapers you’re dealing with.
I would recommend to check out the Attends Slip Regular (Breathable, try degree 8, 9 or 10. The number indicates the absorbency level, 10 is their highest.
Their only fully plastic backed diaper is Attends Slip Regular Plus, and Attends Slip Active which is partially plastic backed the exception of the belt. The EU Attends range are as good and reliable as the Tenas are, and has nothing in common with the crappy US version bearing the same name. I guess you’re familiar with BetterDry, in my opinion only those are superior to Tena Ultima, so if you haven’t tried out them so go ahead. You won’t be disappointed and they are fairly priced too around €1 per piece. Another great brand is Seni, especially the Seni Super Seni Quattro. They’re cheap, really absorbs a lot, and very confortable to wear...
I wouldn’t on the other hand recommend the breathable Abena Abri-Form, they smell awful when wet and the wet parts feels uncomfortably cold and damp and they’re lacking a decent amount of those super absorbent polymers. The tapes are sticky which is doesn’t cling to the cotton feel well.
I wouldn’t either recommend any pants which doesn’t absorb very much and they sag uncomfortably when wet. If you want something more discrete, go rather for a thin diaper with tapes. It’s less of a hassle when changing as you don’t have to remove your pants and underwear.
I hope I was able to help you out a bit...