Thread Report
Whistles: June 2026
Whistles sits in the middle of the pack with an average of 69.7% natural fibre across 402 products — a mix of natural and synthetic. Only 7.7% of products are polyester-heavy — relatively low compared to many retailers. On the bright side, 50.5% of Whistles products are made almost entirely from natural fibres (95%+). The most common fibre across Whistles products is Cotton, appearing in 46.3% of items.
Natural Fibre Distribution
- 14.4%
Synthetic
<30% natural fibre · 58 products
- 34.1%
Blend
30–85% natural fibre · 137 products
- 51.5%
Natural
85–100% natural fibre · 207 products
Top Fibres by Frequency
Fabric by Category — June 2026
| Category | Products | Avg Natural % |
|---|---|---|
| T-Shirt | 36 | 97.8% |
| Jeans | 20 | 95.8% |
| Shirt | 17 | 80.9% |
| Jacket | 25 | 78.3% |
| Dress | 69 | 59.2% |
| Skirt | 20 | 57.5% |
| Coat | 14 | 51.6% |
| Blazer | 5 | 47.7% |
Whistles in Other Months
Monthly Thread Reports
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Frequently Asked Questions
What is Whistles clothing made of?
Based on our analysis of 402 Whistles products, the average garment is 69.7% natural fibre. The most common single fibre is Cotton (in 46.3% of products). The remaining material is typically synthetic — polyester, polyamide, or acrylic.
Is Whistles cotton?
Sometimes — cotton appears in 46.3% of the 402 Whistles products we analyzed, but it's usually blended with synthetics. Only 50.5% of items are nearly all-natural (95%+ natural fibre), so check the composition before assuming a piece is pure cotton.
Is Whistles 100% cotton?
Effectively no. We didn't find any Whistles products that are 100% cotton (or near-pure, 95%+) in our database. Cotton at Whistles is almost always blended with elastane, polyester, or other fibres.
How much polyester does Whistles use?
7.7% of Whistles products are polyester-heavy, meaning polyester makes up 50% or more of the garment. This is below average for fast fashion retailers.
Is Whistles mostly synthetic?
7.7% of Whistles products are polyester-heavy (50%+ polyester). Average natural fibre content is 69.7%, so the rest of the catalog is mostly natural-led.
Does Whistles use natural fabrics?
50.5% of Whistles products are nearly all-natural (95%+ natural fibre). A decent portion of their range avoids synthetic fibres entirely.
Is Whistles sustainable in terms of fabric?
Fabric composition is one factor in sustainability. With an average of 69.7% natural fibre, Whistles is better than many competitors on this measure. Natural fibres generally biodegrade and shed fewer microplastics than synthetics.
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