Thread Report
100% Silk from COS.
10 COS products are made of 100% silk (or near-pure, 95%+) — 2.4% of their catalog. No blends, no synthetics. Sorted by purity.
Every 100% silk piece we found at COS
Sorted by silk percentage. Click any product to view it on COS's site.
Monthly Thread Reports
Get reports like this in your inbox.
We analyze thousands of products every month. Be the first to see new Thread Reports — fabric data nobody else publishes.
No spam. Unsubscribe in one click.
Frequently Asked Questions
Is all COS silk 100%?
No. We found 10 COS products that are 100% silk (or near-pure, 95%+) — that's only 2.4% of their catalog. The rest of COS's silk items are blended with other fibres.
Where can I buy 100% silk clothing from COS?
Every product on this page links directly to COS's website. We sort by silk percentage, so the purest items appear first.
Why does COS blend silk with other fibres?
Blends are cheaper to produce and can add stretch, durability, or wrinkle resistance. If you want pure silk — which biodegrades and sheds fewer microplastics — stick to the 10 items listed below.
Related reports.
Stop buying plastic by accident.
Fibr shows you what every garment is actually made of before you buy it. Green means natural fibre. Red means plastic.
Add to Chrome — It's freeFree forever. No account, no data collected, nothing to lose.