I have tried every bed under the sun for my two very large labradors. This is the ONLY bed that has made any sense. Most of the 'waterproof' ones are complete rubbish. They fill up with air and when the air goes out, it reveals a very thin bit of dacron filling. But not this bed. Its fantastic, and I mean it. I have tried so many expensive beds. I have now gotten rid of all of them, and have these two. You can always throw an old horse blanket down on them in winter for a bit of extra warmth. The filling is GOOD and functional and protects my heavy boy from wearing his elbows out!