Goop works great on smaller rips. Clear or black. Wet your finger to smooth it out.
Used on the kids blow up toys (but not on my blow up toys) and has held surprisingly well too.
We have used John Trembecki in Fort Sask for seat recover a few times. Great to deal with and great work. We had seat covers to replace the torn ones, but I am sure there are options for repairs if you want to go that way. Pending the extent of damage to current seat cover. I think one of the important things is that your foam is still in good shape.