---
title: "Comfort Layer"
description: "What a comfort layer is in a mattress, which materials are used, and how it differs from the support core underneath."
url: "https://bedguide.co.uk/glossary/comfort-layer/"
category: "glossary"
primary_entity: "comfort layer"
date_published: 2026-10-21
date_modified: 2026-10-21
---

# Comfort Layer

> A comfort layer is the padding above the support core of a mattress. It can be memory foam, latex, reflex foam, wool or other natural fillings, or mini springs. Comfort layers set how soft or firm the top feels. The support core underneath sets how the mattress holds your weight. Read the depth of each layer.

**Definition.** A comfort layer is the padding, foam or fibre above a mattress’s support core. It sets how soft or firm the surface feels.

Also called: comfort layers, upholstery layer, top layers.

Two mattresses with the same springs can feel very different because of their
comfort layers. Ask for each layer’s material and depth in centimetres.

Comfort layers usually soften a little as they settle. That is normal. A deep
dip in the core is a warranty question.

Full guide: [what is inside a mattress](/mattresses/whats-inside-a-mattress).
Also: [upholstery depth and GSM](/mattresses/upholstery-depth-and-gsm).

---

Source: https://bedguide.co.uk/glossary/comfort-layer/ · BedGuide — independent UK bed guide; paid links are labelled (see /how-we-make-money/). Facts checked against official sources where possible; see https://bedguide.co.uk/editorial-policy. Report an error: https://bedguide.co.uk/corrections.