Dog beds come compacted like a box bed and expand after opening.  At first I was concerned since the beds didn’t immediately expand like a box bed but after an hour both beds were over 4” and fully expanded. Dogs live then. The covering isn’t what I would call durable but they are holding up for my Dane and Shepherd..Not perfect for a dog that digs before laying down. 
Happy with my purchase and saved money!!! Dogs live them