---
title: "Hollowfibre"
description: "What hollowfibre is in UK duvets and pillows, how it compares with down and feather, and how TOG fits in."
url: "https://bedguide.co.uk/glossary/hollowfibre/"
category: "glossary"
primary_entity: "hollowfibre"
date_published: 2026-10-21
date_modified: 2026-10-21
---

# Hollowfibre

> Hollowfibre is a synthetic fill used in duvets and pillows. The polyester fibres have hollow cores that trap air for warmth. Hollowfibre duvets are usually easier to wash at home than down and feather ones. Choose warmth by TOG rating first, then pick the fill. Fill power applies to down, not hollowfibre.

**Definition.** Hollowfibre is a synthetic polyester fill for duvets and pillows. Its hollow fibres trap air for warmth and are usually machine washable.

Also called: hollow fibre, hollowfibre duvet, synthetic fill.

Microfibre is a finer synthetic fill that can feel softer, closer to down.

Check the wash label and your machine size before you buy a large duvet.

Full guide: [how to choose a duvet](/bedding/how-to-choose-a-duvet). Also: [down
vs hollowfibre](/compare/down-vs-hollowfibre).

---

Source: https://bedguide.co.uk/glossary/hollowfibre/ · 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.