It's like a fiberboard underneath. Not very appealing. It really isn't all that hard to re-cover the headliner yourself. Just go to a fabric store and find suitable material. Get some 3M spray adhesive and some patience and you're done.
Its disgusting if you just rip the material off. (I got annoyed with mine sagging over my head in my old 99 and did just that!)
It sags because the saab headlining material is foam backed. Over time the foam disentegrates and a bit of it stays attached to the material and a bit to the fibreboard molded back piece.
If you rip the material off you are left with the fibreboard exposed and all covered in little dusty bits of foam. They fall off all the time covering you in horrible itchy dust!
If I were you I would take the whole fibreboard out with the material attached (as much as it is!). Not only will it then not annoy you by sagging, but it is the first step toward putting a new liner on!. Material and glue only cost £40-£50 or so in the UK, and it will take you an afternoon to do. Read the guide that Jezza posted.
The headlining in my 900 is currently partially held up my magnets!. The ones out of harddisks are very strong!
ha, i was actually considering it... but only because i'm cheap and rather lazy.
thanks Jezzadee, i actually took a look at that the other day and considered doing it... i just hope i can come across that 3M 90 glue (wal-mart better have it!) and the time - normally these 30 minute jobs turn into several hour long ordeals due to just about anything that comes my way, but i believe that is the option i will take.
I ran into the same problem about a year ago. Tomarse is right on, don't just rip it off, it makes mess and that stuff will be in you're hair after everytime you drive. If you've got a hatch back it's really simple to take out (never tried with the sedan) The 3m spray worked alright, it did start to sag after a few weeks for me, but i might not have let it set idk. We ended up using hot glue and that has held up ever since. It only took my two hours and it was definitley worth it. Made my car few new again.
I used "Aerosol High Heat spray Adhesive" which i bought from a car trimming and restoration specialist. It took me very close to 2 whole cans to do my 2 door 99 headliner and both the rear side trim panels too.
Its been about 6 months now and it hasnt fallen off or sagged yet!. I havent actually driven the car more than about 10miles but its sat in various garages and outside for a few hot days and a lot of very wet ones!
I also painted my fibreboard backing with PVA glue first as it had disentegrated, and i felt it would give me a better surface to stick onto without it sagging again,