High-resilience foam, and why it's not memory foam

The core of the stone nest is high-resilience orthopedic foam, cut from block foam and made in Poland, with no chips and no shredded fill. It sits under the liner and the cover, and it's the part that does all the supporting, so it's worth understanding what it is. The foam is in its natural color, anywhere from white to light yellow.

High resilience is a grade

It isn't a marketing adjective. High resilience describes a class of foam with measured properties, and it's the class made for mattresses and upholstered furniture. Things that take a person's weight every day and are expected to look the same afterwards.

That's the supply chain the core comes out of: the one behind European upholstery, not the one behind pet bedding. It's a deliberate choice and it's most of the reason the bed costs what furniture costs.

Memory foam does the opposite, on purpose

Resilience is the industry's word for springiness. Memory foam sits at the very bottom of that scale, and not by accident: the slow, sinking, holds-the-shape-of-you behavior people buy memory foam for is low resilience. That's what memory foam is for.

That makes sense in a mattress topper. It makes less sense in the one piece of furniture in the house that gets stood up from twenty times a day.

Three things follow from the grade

It springs back rather than sinking. On a low-resilience surface an animal settles into a dent and then has to climb out of it. On this one the foam pushes back; press it with your hand and you'll feel it. Your dog feels that from the first night. For an older dog it's the difference between getting up easily and hauling themselves up, and it matters more every year. It's supportive; it isn't a treatment for anything.

It doesn't hold heat. Memory foam works by softening where it's warm, which is also its best-known drawback: it takes on body heat and keeps it. Dogs run warmer than we do to begin with, and they cool down mostly by panting. High-resilience foam is open-celled and air moves through it, so no warm hollow builds up around your dog. It's also why the bed feels the same in August as it does in January.

It keeps its shape. Every dog bed looks right in the first week. The question is what it looks like later, after it's been slept on in the same spot every night by the same weight. A foam specified to hold its shape is how the furniture industry answers that question in advance instead of afterwards.

Why this particular shape needs it

There's a design reason as well as a comfort one. The cover here is tailored, cut and sewn to an asymmetric organic form, fitted, with a zipper running around the base. A cover like that shows exactly what's underneath it. Slack fabric and a softened edge would be visible immediately.

A loose, deep-pile cover forgives a great deal. This one doesn't, so the core has to hold the silhouette. The design depends on it.

Low, and no walls

The same thickness in every size, deep enough that your dog never feels the floor. And flat: no bolster, no raised sides. A bolster is warm, but it's also something to climb over, which gets harder with every year of a dog's life. Low means your dog steps on rather than in.

The numbers

Two figures define the grade, both measured to European test standards.

• The materials page has both figures, the test methods, and what each one means in plain English.
• Why it's shaped the way it is.