The canvas fabric feels like a good-quality medium-weight fabric, suitable for dog beds. It does have what appears to be a waterproof liner under the soft, fleecy top. The fleecy top is not terribly thick, but it is soft. I prefer not to have the fleece, so I'm glad it isn't too thick or long. (I have a slobbery mastiff and the fleece gets pretty gross.) I ordered the 48 x 36 x 4 size and it is a pretty tight fit on the same size bed. That is an important fact because so far, the only thing that I am truly disappointed with is the tiny, flimsy zipper on the cover. The zipper does not appear to be sufficient for the weight of the canvas. I have not washed or used the bed cover yet, just put it on the bed to make sure it would fit before I wash it and use it. I am very concerned that the zipper will not hold up. Will update once I wash and use the bed cover.

I was pleasantly surprised at the durability and softness of this cover. The sides and bottom are made of a heavy canvas that is durable but but not rough. The top is a soft furry texture thats a nice surface for the dogs to lie on. I may order another one of these as a spare as its one of the few i can get in the extra large size of 36x48. Also, i used this on a bed thats actually 34 x 46 (odd size) and almost 6 inches thick. As i had hoped, the extra dimension on this one made it a perfect fit for my dog bed. I have 3 dogs, and one sometimes takes her frustrations out on 1 of the beds, which is why i'm ordering this to begin with. Having a spare will likely be valuable. If you're on the fence about this cover, don't be. It's well worth it.

I LOVE THESE COVERS! They are well worth the money. Tough and well made. Highly recommend. I've got 2 sizes and both fit very well.