large, non-memory foam, bolster dog bed?

I am looking for a dog bed for my 90lb puppy for the lake - would like water resistant or proof, bolsters, nothing too hot. Memory foam is out for this reason. I've googled and there are a mind boggling number of beds out there, so I thought I'd check here to see if there is a bed someone loves and would recommend.

I've switched to using waterproof/spillproof plastic wrapped toddler mattresses for my borzois. Slap a nice sheet on it that matches your decor and tada. Never going back to regular dog beds.

http://www.walmart.com/ip/Kolcraft-Pedi-800-Crib-Mattress-Owl-Print/39365193

You know, I've had other people tell me this. Maybe this is the route I'll go.

Was just really hoping to find one with bolsters. I think he'd like that. But the price of the crib mattress is hard to beat.