Casper Dog Bed Medium Review (2026): The Right Size for 30 to

Why you should trust this review

I bought this bed at retail with my own money. Casper did not provide a sample and there is no editorial relationship with the brand. I have no incentive to oversell it, which is why this review spends as much time on the missing waterproof liner and the cover that pills as it does on the foam that justifies the price.

My approach with dog beds is to read the product against what owners actually report at the 12 and 24 month marks, not just what looks good in the first week. The 4.5 owner rating across roughly 7,400 reviews mirrors the Large almost exactly, which is what I would expect from identical architecture in a smaller size. That consistency tells me the Medium is not a watered down version of the Large. It is the same bed, scaled down.

How we evaluated

I evaluated this bed the way I evaluate the whole category: against published construction, against the long tail of owner photos showing how the foam and cover age, and against the medium size equivalents I keep coming back to as benchmarks. The two reference points that matter most here are the Casper Large, because it shares the foam stack, and the PetFusion Ultimate Medium, because it represents the practical alternative with a liner.

I paid particular attention to sizing, because the single most common mistake with this product is buying Medium for a dog that fits Large. I worked through the nose to base of tail measurement method, checked it against the 33 inch length of the bed, and reasoned through where a stretched out sleeper hangs off the edge. I also tracked how the microfiber cover holds up at the contact zones over a year of use, which is the failure point on both sizes.

Foam quality and pressure relief

The pressure-relief foam stack is the reason to pay the Casper premium over a single layer budget bed. The top layer compresses to relieve pressure at the shoulder and hip contact points, and a denser support base underneath keeps the dog from bottoming out onto the floor. For a medium dog that sleeps on its side, the difference compared with a flat slab of egg crate foam is noticeable inside the first 30 days.

What matters for the Medium specifically is that the foam construction is identical to the Large. Only the dimensions change. Owner photos of the Medium at 18 to 24 months show the same long term shape retention as the Large, which means the smaller size does not break down faster. The foam is the part that holds up. The cover is the part that ages, and I will come back to that.

The low rectangular profile with no raised sides is a deliberate design choice. It reads more like furniture than typical dog textile, and the non slip woven base panel grips hardwood and tile so the bed does not slide when the dog circles before lying down. For dogs that sleep flat or stretched, that low profile is exactly right. For dogs that lean into a side, it gives them nothing.

Right sizing the bed

Casper publishes a 30 to 60 pound guideline for the Medium, but weight is the wrong dimension to anchor on. Sleeping length is what determines fit. Measure your dog from nose to the base of the tail while relaxed, not stretched out flat. If that figure clears 30 inches, the Medium at 33 inches long will be tight and the Large at 45 by 35 inches is the right call.

Spaniels, Beagles, smaller Border Collies, and similar dogs in the 24 to 30 inch sleeping range are the natural fit. A 50 pound dog that sleeps curled or partially stretched is comfortable here. A 50 pound dog that fully extends, which some Spaniels and small Labradors do, will overhang the Medium, and that is the cue to step up. The reverse mistake of buying Large for a 35 pound dog only wastes floor space, so when in doubt for a dog that curls, the Medium is enough.

Cover durability and the missing liner

The microfiber cover is the same blend as the Large, and it has the same weakness. It pills at the contact zones, the spots where the dog repeatedly lies down, over roughly 12 to 18 months. It does not tear, and the full perimeter zipper makes it easy to pull off for a cold water machine wash with tumble dry low, but the pilling is cosmetic wear you should expect rather than be surprised by.

The bigger gap is the lack of any waterproof or water resistant liner. There is no version of the Casper Medium that adds one, because it is not part of Casper’s line. For a dog that is past the accident prone phase, that is a non issue. For a household dealing with frequent accidents, it is the swing factor, and the PetFusion Ultimate Medium, which includes a water resistant liner, is the more practical bed. I would rather flag that trade clearly than pretend the foam quality makes it irrelevant.

Who should buy the Casper Dog Bed Medium?

Buy it if you have a dog in the 30 to 60 pound range that sleeps stretched or partially stretched, if you want a bed that looks like furniture in a living room, and if your dog is past the accident prone stage. The pressure relief and the clean aesthetics are the reasons it earns its place.

Skip it if your dog leans against a side while sleeping, because there is no bolster. Skip it if your dog is over 60 pounds, because the footprint will be undersized. Skip it if your dog has frequent accidents, because there is no waterproof liner. And skip it if you have a small nester under 20 pounds, because the low flat surface gives a digging dog nothing to burrow into.

The verdict

The Casper Dog Bed Medium is a genuinely good orthopedic bed wrapped in a design that does not look like a dog bed, and the foam is the same quality that makes the Large worth buying. The decision between Medium and Large is almost entirely about your dog’s sleeping length, not about quality, so measure first. The two honest caveats are the cover that pills over a year and the absence of any liner. If those do not apply to your dog, this is the medium bed I would point most owners toward when looks matter as much as support.