Thread Report · 1,984 products analyzed · Updated July 20, 2026

What is J.Crew made of?

Better than most. J.Crew averages 78.3% natural fibre, which puts them ahead of many competitors. But not everything is equal.

According to Fibr's Thread Report (July 2026), 7.5% of J.Crew's 1,984 analysed products are majority-synthetic, with an average natural-fibre content of 78.3%.

1,984Products Analyzed
78.3%Avg Natural Fibre
7.5%Polyester-Heavy
63.9%Nearly All-Natural

J.Crew's t-shirts are 97% natural fibre, but their skirts are just 71.3%. That's a 26-point gap — where you shop within J.Crew matters as much as whether you shop there at all.

The full picture on J.Crew.

J.Crew is one of the stronger performers in our dataset, averaging 78.3% natural fibre across 1,984 products we analyzed. Only 7.5% of products are polyester-heavy — relatively low compared to many retailers. On the bright side, 63.9% of J.Crew products are made almost entirely from natural fibres (95%+). The most common fibre across J.Crew products is Cotton, appearing in 63.6% of items.

How Products Break Down

1,984Products

  • Synthetic

    <30% natural fibre · 276 products

    13.9%

  • Blend

    30–85% natural fibre · 351 products

    17.7%

  • Natural

    85–100% natural fibre · 1,357 products

    68.4%

Most Common Fibres (% of products containing)

Cotton
63.6%
Elastane
18.6%
Polyester
14.2%
Polyamide
9.9%
Wool
8.6%

Where to buy (and avoid).

Not all categories at J.Creware equal. Here's where the natural fibres are.

Safe Zones · 70%+ natural

T-Shirt97% natural · 158 productsJeans94.5% natural · 85 productsSweater92.4% natural · 212 productsCoat87.8% natural · 32 productsShirt87.3% natural · 234 productsHoodie86.7% natural · 11 productsDress79.1% natural · 198 productsJacket77.7% natural · 124 productsBlazer76.2% natural · 34 productsSkirt71.3% natural · 107 products

What we found.

Across 1,984 products analyzed, J.Crew averages 78.3% natural fibre content.

7.5% of J.Crew products are majority polyester — that's 149 items made mostly from plastic.

J.Crew t-shirts are their strongest category at 97% natural fibre (158 products).

Their weakest category: skirts at just 71.3% natural (107 products).

Only 63.9% of products (1,268 items) are 95%+ natural fibre.

All categories ranked by natural fibre percentage
CategoryProductsAvg Natural %
T-Shirt15897%
Jeans8594.5%
Sweater21292.4%
Coat3287.8%
Shirt23487.3%
Hoodie1186.7%
Dress19879.1%
Jacket12477.7%
Blazer3476.2%
Skirt10771.3%

Sample Products

A selection of J.Crew products from our database — from most natural to most synthetic. Click to view on the retailer's site.

Lower-rise wide-leg jean105% Natural
Lower-rise wide-leg jean
Cotton 105%
Shop on J.Crew→
Montauk crochet tank top105% Natural
Montauk crochet tank top
Cotton 105%
Shop on J.Crew→
Mid-rise relaxed kickout jean105% Natural
Mid-rise relaxed kickout jean
Cotton 105%
Shop on J.Crew→
Barrel-leg jean105% Natural
Barrel-leg jean
Cotton 105%
Shop on J.Crew→
Heritage 14 oz. fleece hoodie84% Mixed
Heritage 14 oz. fleece hoodie
Cotton 84%Polyester 16%
Shop on J.Crew→
Heritage 14 oz. fleece sweatshirt84% Mixed
Heritage 14 oz. fleece sweatshirt
Cotton 84%Polyester 16%
Shop on J.Crew→
Space-dyed sweater-tank83% Mixed
Space-dyed sweater-tank
Cotton 83%Polyamide 17%
Shop on J.Crew→
Wide-leg trouser in striped linen blend83% Mixed
Wide-leg trouser in striped linen blend
Linen 66%Viscose 34%
Shop on J.Crew→
Lana one-piece in Classic Sculpt™30% Synthetic
Lana one-piece in Classic Sculpt™
Polyamide 38%Polyester 36%Cotton 30%
Shop on J.Crew→
Kids' stretchy woven leather belt30% Synthetic
Kids' stretchy woven leather belt
Polyester 62%Cotton 30%
Shop on J.Crew→
Claudia one-piece in Classic Sculpt™30% Synthetic
Claudia one-piece in Classic Sculpt™
Polyamide 38%Polyester 36%Cotton 30%
Shop on J.Crew→
Lana bikini top in Classic Sculpt™30% Synthetic
Lana bikini top in Classic Sculpt™
Polyamide 38%Polyester 36%Cotton 30%
Shop on J.Crew→

The verdict.

J.Crew is one of the better options for natural fabrics. With 63.9% of products being nearly all-natural, you have real choices here. Still — always check the label. Not every item is created equal.

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  • Downloadable PDF report for every brand we track
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Frequently asked questions.

What is J.Crew clothing made of?

Based on our analysis of 1,984 J.Crew products, the average garment is 78.3% natural fibre. The most common single fibre is Cotton (in 63.6% of products). The remaining material is typically synthetic — polyester, polyamide, or acrylic.

Is J.Crew cotton?

Sometimes — cotton appears in 63.6% of the 1,984 J.Crew products we analyzed, but it's usually blended with synthetics. Only 63.9% of items are nearly all-natural (95%+ natural fibre), so check the composition before assuming a piece is pure cotton.

Is J.Crew 100% cotton?

Some pieces are. Of the 1,984 J.Crew products we analyzed, 887 are 100% cotton (or near-pure, 95%+) — that's 44.7% of the catalog. The rest are blends.

How much polyester does J.Crew use?

7.5% of J.Crew products are polyester-heavy, meaning polyester makes up 50% or more of the garment. This is below average for fast fashion retailers.

Is J.Crew mostly synthetic?

7.5% of J.Crew products are polyester-heavy (50%+ polyester). Average natural fibre content is 78.3%, so the rest of the catalog is mostly natural-led.

Does J.Crew use natural fabrics?

63.9% of J.Crew products are nearly all-natural (95%+ natural fibre). A decent portion of their range avoids synthetic fibres entirely.

Is J.Crew sustainable in terms of fabric?

Fabric composition is one factor in sustainability. With an average of 78.3% natural fibre, J.Crew is better than many competitors on this measure. Natural fibres generally biodegrade and shed fewer microplastics than synthetics.

Methodology: We analyzed 1,984 J.Crewproduct pages, extracting the fabric composition listed by the retailer. Products are categorized by name keywords. Natural fibre percentage is the sum of all natural fibres (cotton, linen, silk, wool, viscose, lyocell, etc.) in each product's composition. Data is refreshed monthly.

Use this data.

The Thread Report is openly licensed. Cite it, download it, query it directly — just link back to the source page.

Last updated
License
Free to cite with attribution
Raw dataset (JSON)
info.tryfibr.app/jcrew.json ↓
Computed stats (JSON)
/api/thread-report/jcrew
About the dataset
How it's built & how to cite it
LLM index
/llms.txt

Suggested citation

Fibr Thread Report — J.Crew, 2026-07-20. tryfibr.app/thread-report/jcrew

Related reports.

Is J.Crew Sustainable?What the fabric data says — and what it can'tJ.Crew Skirt107 products, 71.3% naturalJ.Crew T-Shirt158 products, 97% naturalJ.Crew Sweater212 products, 92.4% naturalJ.Crew Shirt234 products, 87.3% naturalPolyester at J.CrewIn 14.2% of productsCotton at J.CrewIn 63.6% of productsElastane at J.CrewIn 18.6% of productsJ.Crew vs Abercrombie & Fitch78.3% vs 73.7% naturalJ.Crew vs Acne Studios78.3% vs 77.6% naturalBrand rankingsSee where every brand lands on natural fibreAbout the Thread ReportHow the dataset is built, and how to cite it

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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