Damp, still air is the usual cause. Dry the space, let bags breathe and check for mould.
You take a bag out of the closet after a few months and it smells stale and damp, though it looked clean when you put it away.
A musty smell usually means moisture and still air, not dirt. Dry the closet, let the bag breathe, and check for mould. The EPA links mould and musty odours to moisture, and says that controlling moisture is the key to controlling mould.
What the sources say
- The EPA advises keeping humidity low, drying wet items within 24 to 48 hours, and fixing the source of any moisture.
- The Canadian Conservation Institute’s care note for leather says that high humidity encourages mould. It gives 45 to 55 per cent relative humidity as the target for collections, and warns against levels above 65 per cent.
- The CCI also says to store leather in the dark, away from heat and from damp areas.
What to do
- Take the bag out and open every pocket and compartment.
- Check the lining, seams and base for white, grey or green marks. If you find mould, see our answer on mould in leather bags.
- Air the bag in a dry, ventilated place, out of direct sun.
- Check the closet for damp walls, a cold outside wall or a lack of airflow.
- Store bags upright with a little stuffing, in cotton covers or on an open shelf.
When the smell does not go
A smell that stays after drying can mean mould in the lining or padding. If the bag is valuable, ask a specialist.
Where this answer stops
The conservation notes cited are written for museum objects. For everyday bags, treat them as a guide. This is general advice, not a diagnosis.
Sources and further reading
Three more perspectives
Air stored bags every few weeks. Open the bag, leave it in a dry, ventilated room for an hour or two, and check the lining and corners. A bag that is aired often is much less likely to develop a smell.
Cotton bags, dust bags and acid-free paper let air move, while sealed plastic traps moisture. For long storage, a breathable cover is a safer choice than a closed plastic box.
Do not put a bag away damp from rain, sweat or a spilled drink. Dry it fully first, away from direct heat. Many musty bags started life as a bag put away a little wet.
Independent and unofficial. berabags is an independent editorial site. It is not affiliated with, endorsed by or sponsored by any bag brand, retailer, airline or agency named on this page. This page contains no affiliate links; if berabags adds any in future they will be labelled. Rules and policies change, so check the linked source before you act. This is general information, not legal, medical or professional advice.
More Talk questions and guides
- TalkMold on a Leather Bag: What To Do First
- TalkMildew on a Canvas Tote: How To Deal With It
- TalkLeather Handbag Soaked in Rain? What to Do Next
- TalkCan You Machine-Wash a Canvas Tote Bag?
- Bag Storage Solutions for Every Lifestyle and Space
- TalkIs a Water-Resistant Backpack Safe for a Laptop?
- Bag Maintenance: How Do You Keep Every Bag Looking New Longer?
- TalkFaux Leather Bag Peeling: Can It Be Fixed?
- Genuine Leather Promise: What You Need to Know About Material Longevity and Durability
- Investment Angle: Why Premium Handbags Are Smarter Than Fast Fashion in 2026