Body Glove NeverWet https://www.amazon.com/dp/B084JBKT2P?ref=ppx_pop_mob_ap_share

If you don't plan to use the front seat covers, I've found just the back seat covers at some AutoZone locations in the past (you might need to check 2-3 locations to find them). I think the back seat covers were only $50-60.

I've used these for a few years now (replaced a few times) and very satisfied overall. I did cut it loose a bit around the seat belt latches so they wouldn't keep getting covered up as people come and go. Also, if you have to fold a seat down to accommodate large items in the trunk (e.g., golf clubs, skis, etc), make sure you slide the seat cover off of the headrest (on the side you're folding down) first so it doesn't stretch too much (potentially ripping it).