The material

Our Foam

Every bed we make is a cover, a liner and a core. The core is the part that decides whether the bed is still doing its job in year five.

PawLunova — Our Foam (page source)

PawLunova · Our Foam

One number decides
whether a dog bed survives.

Almost nobody prints it. It is foam density, it is measured in kilograms per cubic metre, and once you know it you can never buy a dog bed the old way again.

The short version

  • Dog beds are sold on the cover. Covers decide week one. Foam density decides year three.
  • Every PawLunova memory foam bed is built on a 50kg/m³ high-density core, CertiPUR-US certified.
  • Under that: a waterproof liner. Over it: a cover that zips off and washes at 30°C.
  • We back the core with a 5-year no-flatten guarantee, because we know what it is made of.

Why your last dog bed died

Here is the uncomfortable mechanic of this whole category. A dog bed is judged by hand, in a shop or in a photograph, in the first ten seconds. Everything you can assess in ten seconds — how it looks, how plush it feels, whether the stitching is neat — is the cover. And the cover is the cheap part.

So that is where the money goes. Beautiful herringbone, thick bouclé, a satisfying zip. Underneath, in the part nobody photographs and no listing describes, sits a block of low-density foam or a bag of shredded offcuts. Your dog lies on it for twelve hours a day. Thirty kilos of Labrador, in the same spot, every night.

Low-density foam does not fail dramatically. It fails quietly and on a schedule. The cells collapse, the block loses recovery, and one morning you notice your dog is essentially lying on the floor with a duvet cover over it. The bed still looks fine. That is the trap.

A dog bed is not a soft furnishing. It is a load-bearing structure that happens to be soft, holding up a specific weight for four thousand hours a year.

What foam density actually means

Density is how much foam material is packed into a given volume, written as kilograms per cubic metre (kg/m³). It is not the same as firmness — you can have soft high-density foam and hard low-density foam. Density measures how much there is of it, and therefore how long it can keep doing its job before the structure gives out.

Roughly, this is the landscape you are buying in:

Foam density Typically found in What happens under a dog
Shredded
no density rating
Bean-bag style beds, cushion beds, "fibre filled" Migrates away from the pressure points within weeks. Support is gone before the fabric shows any wear at all.
Under 25kg/m³
low density
Supermarket and marketplace beds, most sub-£40 "orthopaedic" listings Noticeable flattening in the first few months under a medium or large dog. This is the eleven-week bed.
25–35kg/m³
standard upholstery
Mid-market pet beds, general furniture cushioning Fine for a light dog. Under 25kg+ of daily load, expect meaningful sag inside a year or two.
35–45kg/m³
high density
Better human mattress toppers, premium pet beds Holds shape well. The point at which "orthopaedic" starts to mean something structural rather than decorative.
50kg/m³
PawLunova core
Our memory foam beds Built to keep its recovery under a large dog for years, not months. This is the specification our 5-year guarantee is written against.

Density bands above describe the general foam market, not any specific competitor's product. We publish ours; most brands publish nothing, which is rather the point of this page.

Memory foam, and the three things it is not

Memory foam is viscoelastic — it responds to heat and weight, moulds to the shape pressing into it, then recovers when the pressure lifts. For a dog with stiff hips or a bony elbow, that matters: the bed spreads the load instead of concentrating it on the two or three points that already hurt.

Three things sold as memory foam that are not doing that job:

  • Shredded memory foam. Real memory foam, chopped up. Chopping it destroys the one property you were paying for — the continuous surface that distributes weight. It becomes a bean bag that migrates out from under your dog.
  • An egg-crate top layer. A 2cm convoluted sheet glued over ordinary foam. It adds a texture, not support. Underneath is whatever the manufacturer could buy cheapest.
  • "Memory foam infused". A marketing phrase with no technical meaning. Ask for the density; you will rarely get a number back.

What CertiPUR-US certification covers

Your dog sleeps on this thing with their nose pressed into it for a third of their life. CertiPUR-US is an independent foam certification programme, and it tests the foam for what is not in it:

  • Made without ozone depleters
  • Made without PBDE, TDCPP or TCEP flame retardants
  • Made without mercury, lead and other heavy metals
  • Made without formaldehyde, and without regulated phthalates
  • Tested for low VOC emissions for indoor air quality

It is a chemical-content and emissions standard, not a comfort rating — it tells you the foam is clean, not that it is good. Density tells you it is good. We want both on every bed we sell.

The three layers, and why the order matters

  1. The core — 50kg/m³ high-density foam

    The part doing the work. Everything above it is there to protect it, because the day the core fails, the bed is finished no matter how good the fabric still looks.

  2. The waterproof liner

    Sealed around the foam. Wet coats, muddy paws, an accident from an older dog, a spilt water bowl — none of it reaches the core. This is the layer that makes a washable bed genuinely washable rather than technically washable.

  3. The zip-off cover — washes at 30°C

    The part that gets dirty is the part that comes off. So you can wash it as often as it needs washing without ever wearing the bed out, because you are never washing the bit that matters. Full care instructions are here.

The maths that makes the good bed the cheap one

This is the part worth doing on the back of an envelope before you buy anything, from us or anyone else.

A

The £55 bed, replaced yearly

Three beds over three years is £165, for 1,095 nights of sleep that got progressively worse.

About 15p a night — and rising, because the last two months of every bed are barely a bed.

B

The £129 bed, guaranteed 5 years

One bed, 1,825 nights, still recovering its shape on the last one.

About 7p a night — less than half, for a bed that was better on every single one of those nights.

The expensive dog bed is the one you buy over and over. That is not a slogan; it is just what the numbers do when foam density is left out of the decision.

Foam questions people actually ask

What foam density is best for a dog bed?

For a small or light dog, 25–35kg/m³ will hold up reasonably. For anything medium-sized and upwards, and for any dog with joint problems, look for 35kg/m³ as a minimum and treat 50kg/m³ as the standard worth paying for. Density is the number that predicts how long the support lasts.

Is memory foam or orthopaedic foam better for dogs?

They are not opposites. "Orthopaedic" describes what a bed is meant to do — support joints and spread pressure — and memory foam is one of the materials used to do it. A single-piece, high-density memory foam core is the construction that most reliably delivers on the word. Our orthopaedic buying guide covers this in full.

How thick should the foam be?

Thickness and density work together. A thin layer of very dense foam will bottom out under a heavy dog; a thick layer of cheap foam will simply collapse more slowly. As a rule of thumb, a large dog wants meaningful depth under the hips as well as high density. Exact depths are listed on each product page.

Can I wash the foam itself?

No — and you should not need to, which is the entire reason for the waterproof liner. Soaking a foam core damages its cell structure and it will not dry properly inside. Wash the cover at 30°C, wipe the liner, and the core never gets wet. Full instructions here.

Will a high-density bed feel hard to my dog?

No. Density is about how much foam is in the block, not how firm it feels. A high-density memory foam core feels like it gives way and cradles — it just keeps doing that in year four, which a low-density block cannot. If firmness is your concern, the size and firmness guide explains how to match it to your dog.

What does the 5-year no-flatten guarantee actually cover?

The foam core losing its structural shape under normal domestic use, by the dog the bed was sized for, within five years. If that happens, we replace the bed. It excludes chewing, cover fabric wear, misuse and normal cosmetic ageing — our beds are not chew-proof and we would rather say so here than in the small print.

Now you know the number. Go and use it.

On our beds or anyone else's — ask for the foam density before you ask about the colour. Every PawLunova memory foam bed is 50kg/m³, CertiPUR-US certified, and comes with 100 nights to change your mind.

Next: How to choose an orthopaedic dog bed · Why dog beds go flat · How to wash a dog bed

Cut one open

Where the padding goes.

Three beds, same dog, same eighteen months. The difference is not what they felt like in the shop, it is how much material was in them to begin with.

  1. 44mm of loft
    Day one

    Fibre fill

    Loose polyester, whipped up to look generous in the photograph. It is mostly air, and air is the first thing to leave.

  2. 22mm left, and not where they lie
    Six months

    Shredded offcuts

    Chopped foam scrap migrates to the edges under a dog's weight. The middle, where the dog actually lies, goes first.

  3. 7mm, and the floor underneath
    Eighteen months

    Low-density foam

    It felt firm on the shop floor. Firmness is a first impression. Density is what is still there two winters later.

Density is how much foam is actually in the foam. It is the number that decides which of these three your bed becomes.

See the beds built on it

The number that matters

Density isn't firmness. It's how much foam is actually in the foam.

Density measures how much material is packed into every cubic metre. A low-density foam can feel firm on day one and still collapse by month six, because feel and structure are not the same thing. A 50kg/m³ core keeps its shape under a dog's weight put on it in the same place, night after night, which is why we can guarantee the foam for five years.

50

kilograms of foam per cubic metre

The detail

What owners ask about the foam.

It's the density of the foam – how much material is packed into every cubic metre. Density isn't the same as firmness: a low-density foam can feel firm on day one and still collapse by month six. High-density foam keeps its structure under repeated weight, which is why a 50kg/m³ core is still supporting your dog's hips and elbows years later. It's also why we can put a 5-year guarantee on it.

CertiPUR-US is an independent certification programme for flexible polyurethane foam. Foam that carries it has been tested by an accredited laboratory for content, emissions and durability. It is the same standard used across human mattresses, and it is the reason we can tell you what is inside the bed rather than asking you to take our word for it.

Our beds are vet-informed and built to distribute weight so that pressure isn't concentrated on hips, elbows and shoulders – which is what makes lying down and getting back up harder for dogs with joint wear. A bed isn't a treatment, and it won't replace veterinary care, so please keep talking to your vet. What it can do is change the surface they spend fourteen hours a day on. Owners of older dogs are the ones who write to us most.

It sits between the cover and the foam. Wet coats, muddy paws and accidents stop at the liner rather than soaking into the core, which is what turns a bed sour long before the foam gives out. The cover zips off over the top of it and machine-washes at 30°C.

You can only buy the core once.

Everything else on a bed can be washed, replaced or lived with. The foam is the part you are actually choosing.

100-night sleep trial · 5-year foam guarantee · Free UK delivery over £40