A denim jacket takes about 10 to 12 months to decompose — surprisingly fast, because denim is mostly cotton.
Why does it take this long?
But the cotton is the only quick part. The synthetic thread, metal rivets and buttons, and indigo dyes remain in the soil long after the fabric is gone. Modern stretch denim also contains elastane, which leaves microplastics behind. Fast fashion means billions of garments are discarded yearly.
Where it sits on the timeline
2 months
🍎 Apple core
20 years
🛍️ Plastic bag
10–12 months
🧥 Denim jacket
4,000+ years
🍾 Glass bottle
Greener alternative
Buy less, choose pure cotton
Durable, pure-cotton denim without stretch blends lasts longer and breaks down more cleanly at the end.
See sustainable denim →
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Frequently asked questions
How long does a denim jacket take to decompose?
A denim jacket takes approximately 10–12 months to decompose in nature.
Is denim biodegradable?
The cotton is, within about a year. Rivets, synthetic thread, and dyes persist much longer.
How can I dispose of old denim responsibly?
Donate, upcycle, or use textile recycling — denim is often turned into insulation and new fabric.