Thread Report

COS Blazer Fabric Composition.

We analyzed 38 blazer products from COS. At 64.9% average natural fibre, blazers fall below COS's overall average of 77.6% by 12.7 points — one of their weaker categories. Wool is the most common fibre in COS blazers, found in 52.6% of products.

38Blazer Products
64.9%Avg Natural Fibre
77.6%COS Overall

Top Fibres in COS Blazer

Wool
52.6%
Elastane
39.5%
Polyester
36.8%
Linen
21.1%
Viscose
21.1%

How COS Compares — Blazer

Average Natural Fibre % by Brand

Massimo Dutti
89.5%
& Other Stories
84.5%
J.Crew
76.2%
Arket
68%
COS
64.9%
Whistles
55.5%
Ganni
54.2%
Country Road
50.9%
Aritzia
48.6%
AllSaints
47.3%
Zara
45.6%
Bershka
42.4%
Mango
40.1%
New Look
28.4%
River Island
20.8%
ASOS
15.4%
Topshop
14%
Pull&Bear
13.1%
Princess Polly
12.7%
Meshki
12.6%
Boohoo
4.2%
House of CB
3.5%

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Frequently Asked Questions

What are COS blazers made of?

Across 38 blazer products from COS, the average natural fibre content is 64.9%. This is below COS's overall average of 77.6%.

Are COS blazers good quality fabric?

At 64.9% average natural fibre, COS blazers are a mixed bag. Higher natural fibre content generally means better breathability, durability, and less microplastic shedding.

Should I buy blazers from COS?

If fabric composition matters to you, COS blazers average 64.9% natural fibre. Use the Fibr browser extension to check individual items while shopping — fabric quality varies widely even within one category.

Related reports.

COS Full Report837 total productsAll Brands: Blazer1766 products across all brandsCOS T-Shirt95.8% naturalCOS Sweater98.5% naturalCOS Coat76.1% naturalCOS Dress67.5% natural

Explore the Thread Report

Part of an openly-licensed dataset.

This page is one view of Fibr's Thread Report — fabric composition data for major fashion retailers, free to read and cite. Explore the rest:

About the Thread ReportWhat the dataset is, how it's built, and how to cite it.All brand reportsFabric breakdowns for every retailer we track.Brand rankingsWho uses the most natural fibre — and the most polyester.Brand comparisonsHead-to-head fabric data for every viable brand pair.Research findingsOriginal findings built on the dataset.State of FabricThe annual report on fashion's fibre mix.MethodologyHow we classify fibres and compute every number.Fabric guides & researchHow to read labels, decode fibres, shop smarter.

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