I foster rescue dogs, some of them arrive in pretty bad condition, with injuries, healing fractures, scared to death, etc. it is truly sad to witness the cruelty with which some people are capable of treating their animals. I also foster the very old and sick dogs, they are called "foster" dogs, but in the actuality, nobody will adopt an old dog with expensive heart, tooth, arthritis, and various other medical issues. I just make them comfy, and let them live out their last days as pain-free as is possible, inside of a comfortable home, with lots of love, good food, and nice, comfy, supportive dog beds. I have about 16 of this type of dog bed now, they are extremely supportive ,and sized to fit dogs of up to about 60 pounds. Some of these beds have been in my possession for about 8-10 years, with a steady progression of 40-50 pound dogs using them. They arrive with a very nice inner eggshell foam outer mattress, and a firmer inner portion of the mattress. The cover is a tough fabric on the side the meets the floor, and a comfy fleece-type fabric on the other side. The fabric covering has a nice, tough zipper, allowing one to remove the cover for washing. I additionally purchase thick and tough dog blankets to lay on top of the beds, for both extra comfort for those arthritic legs and hips, and to limit the wear and tear on the zippered mattress cover.I have never had an issue with any of the many, many dog beds of this brand and type that I have purchased. They tend to last very well for about 8 to 10 years of non-stop and rough usage. Towards the end of their life span, I stack two of the beds on top of each other, and can get another year of use out of the beds with that method, until the foam layers become just too flattened to offer good support and must be disposed of.I just purchased two more of these beds, the price is the best that I have ever seen for a bed of such remarkable staying-power, and with such professional-level supporting capabilities. If these dog beds can remain firm, supportive, and in good condition for so many years, and after being used non-stop for a steady progression of dogs, they will certainly meet the needs and demands of even the most discerning pet owner. I can recommend these beds without reservation. And, many of my foster dogs who are no longer on this earth, spent their last moments in comfort as a result of having had access to these beds. For that, any pet owner, whether a dog rescue member, or a private pet owner will be grateful. Seeing some of the old, arthritic, and abused fosters that I get laying on these beds in comfort, with no moans and groans of pain, makes it all worthwhile.