---
title: "Memory Foam vs High-Density Foam Cushion: Which Is Inside?"
url: "https://cushionguide.com/answers/is-cushion-foam-memory-foam/"
section: "The Cutting Table"
author: "Nate Kowalski, The Pattern Engineer of Detroit"
author_url: "https://cushionguide.com/masters/nate/"
published: "2026-06-26"
updated: "2026-09-24"
keywords: "memory foam vs high density foam cushion, is cushion foam memory foam, 32 density foam cushion, cold foam floor sofa, high resilience foam cushion"
---

# Is the foam in your cushions memory foam?

*Short answer: no. Long answer: two foams, two densities, and one reason both of them spring back when you stand up.*

Also asked as: Is the foam memory foam or sturdy foam?; Is it memory foam?

> **The quick answer:** The foam in the workshop's custom cushions is not memory foam but a resilient, sponge-type polyurethane that springs back and holds its shape instead of slowly sinking. Bench and window-seat cushions use firm 32-density high-density comfort foam, about 2.0 lb/ft³ (32 kg/m³), and the floor and modular sofas use high-resilience cold foam, about 1.75 lb/ft³ (28 kg/m³).

![Ochre-striped oatmeal cushion on an olive paneled storage bench under a kitchen window, with pillows and an olive tree](https://cushionguide.com/media/window-seat-cushions/ochre-stripe-cushion-olive-paneled-kitchen-window-bench-1600.webp "A pale striped seat lifts a deep olive bench, while block-print, bobble-trim and linen pillows layer in pattern and texture.")

## Key facts

- Standard cushion foam is not memory foam.
- Bench and window-seat cushions use 32-density high-density comfort foam, about 2.0 lb/ft³ (32 kg/m³).
- Floor and modular sofas use high-resilience cold foam, about 1.75 lb/ft³ (28 kg/m³).
- Both foams are resilient and don't sag or lose shape over time.
- The floor sofa foam is described as a soft, sponge-type foam.
- Cushions are made to exact sizes.

## What's actually inside

- ✓ Bench and window-seat cushions: 32-density high-density comfort foam, about 2.0 lb/ft³ (32 kg/m³)
- ✓ Floor and modular sofas: high-resilience cold foam, T28, about 1.75 lb/ft³ (28 kg/m³)
- ✓ Floor sofa foam rated ILD 42, each block in its own inner cover
- ✓ Both foams spring back when you stand up
- ✓ Tufted floor cushions: no foam at all, just densely packed silicone-ball fiber

## What it isn't

- ✗ Memory foam, the slow-sinking, slow-recovering kind
- ✗ A foam that sags or loses its shape over time
- ✗ A kit with a wooden sofa base; bases aren't made

## Why the sofa foam gets compared to memory foam

Here's where it gets muddy, partner. The shop once described the floor sofa foam's feel as similar to memory foam, and one quote for a custom stacked 'cloud couch' offered high-density memory foam. Most of the time the answer is plain: not memory foam.

So treat foam as a spec, not a vibe. If you specifically want memory foam, get it confirmed in writing before you order, with the density and thickness written next to it. Measure twice; the fabric remembers.

## Density vs. feel in one paragraph

Density is weight per volume. Firmness is how hard the foam pushes back, measured as [ILD](https://cushionguide.com/glossary/#ild). They travel together, but they aren't the same number. The 32-density seat foam is described as firm; the cold foam on the [modular floor sofa](https://cushionguide.com/cushions/modular-floor-sofas/) is called a soft sponge.

For the full comparison, read [high-density foam vs memory foam and latex](https://cushionguide.com/guides/high-density-foam-vs-memory-foam-latex/), then try the [foam firmness finder](https://cushionguide.com/studio/foam-firmness-finder/). How do you want your [window seat cushion](https://cushionguide.com/cushions/window-seat-cushions/) to feel at the end of a long read?

> **Tailor's margin:** A 32-density high-density foam cushion springs back the moment you stand; memory foam sinks slowly and takes its time returning.

> Custom bench cushions use firm 32-density high-density foam, about 2.0 lb/ft³, not memory foam; if memory foam matters, ask for it by name.
>
> — Nate

## Buyer questions

**A common question:** Is the foam in your cushions memory foam, or a firm, sturdy foam?

**The workshop's answer:** The cushions use 32 DNS (32-density) high-comfort foam. It's a firm, high-density foam, not memory foam, and it's very resilient, so it won't sag or lose its shape over time.

**A common question:** What density is the floor sofa foam, and is it memory foam?

**The workshop's answer:** It's 28-density high-quality cold foam, about 1.75 lb/ft³ (28 kg/m³). It isn't memory foam; the shop calls it a soft sponge, though it once described the feel as similar to memory foam.

**A common question:** I want a super cushy 'cloud couch' from stacked cushions. Can you do that, and do you sell a base?

**The workshop's answer:** The shop said it can make cushions to any exact measurements using high-density memory foam, with washable covers. It doesn't make wooden bases.

**A common question:** Does a bench cushion come with the foam, or just the cover?

**The workshop's answer:** The foam is included. Standard custom cushions ship complete with a high-density foam insert in a zippered, washable cover. Covers-only is a separate, cheaper option with no filling.

## Questions buyers ask next

### Does high-density foam go flat over time?

The 32-density seat foam is described as very resilient, so it springs back and doesn't sag or lose its shape over time. Thickness still shapes the look: 4 and 5 in cushions use the same foam and feel alike.

### What's the difference between 32 kg/m³ and 28 kg/m³ foam?

Density. Bench and window-seat foam is about 2.0 lb/ft³ (32 kg/m³) and described as firm; the floor sofa's cold foam is about 1.75 lb/ft³ (28 kg/m³) and called a soft sponge. Both are resilient foams, not memory foam.

### Can I request memory foam for a custom build?

One reply for a custom stacked-cushion build offered high-density memory foam, but it isn't the standard fill. If memory foam matters to you, name it before ordering and check that the quote lists the foam type, density and thickness.

## Related at the atelier

- [Window Seat Cushions in Three Prints: Measure the Seat First](https://cushionguide.com/readings/three-printed-cushions-piled-parisian-window-bench/): To measure a window seat cushion, take the bench top wall to wall, the depth from the back wall to the front edge, and the thickness you want, and write the unit beside every number.
- [Moss Green Corduroy Window Seat Cushion in a Garden Sunroom](https://cushionguide.com/readings/moss-green-corduroy-window-seat-garden-corner/): A window seat cushion on a drawer base needs a firm, box-cut foam block, because the hard top gives nothing back and the cushion carries all the comfort.
- [Window Seat Cushion in Speckled Bouclé: The Foam Inside](https://cushionguide.com/readings/black-speckled-boucle-window-bench-cushion-sash-window/): A custom window seat cushion is built on high-density polyurethane foam of about 2.0 lb/ft³ (32 kg/m³), medium-firm to firm, wrapped in polyester fiber.
- [What density foam goes into a custom bench cushion?](https://cushionguide.com/answers/bench-cushion-foam-density/): Custom bench, banquette and seat cushions are made with 32-density foam: about 2.0 lb/ft³ (32 kg/m³) high-density, high-resilience polyurethane with a medium-firm feel.
- [Is the floor sofa cold foam or regular high-density foam?](https://cushionguide.com/answers/cold-foam-vs-high-density-foam-floor-sofa/): The floor sofa uses cold foam: its base mattresses are HR (high-resilience) cold foam at T28 density with an ILD of 42.
- [What density foam is inside a floor sofa?](https://cushionguide.com/answers/floor-sofa-foam-density/): Floor sofa seat mattresses use 28-density high-density foam, about 1.75 lb/ft³ (28 kg/m³): a medium-hard flexi foam that stays comfortable and lasts for years without collapsing.
- [How thick should a bench cushion be? Work back from seat height](https://cushionguide.com/guides/cushion-thickness-seat-height-calculator/)
- [Reading nook bolsters, back pillows and a seat depth that invites a nap](https://cushionguide.com/guides/reading-nook-cushion-bolsters/)

*± 1/4 in — Nate*

---

Written by Nate Kowalski (https://cushionguide.com/masters/nate/) for CushionGuide (https://cushionguide.com/about/). The site explains made-to-measure cushions and the partner workshop makes them; measurements are in inches first. This Markdown mirrors the page at https://cushionguide.com/answers/is-cushion-foam-memory-foam/