How to Wash & Care for Cotton Muslin Bags (Do They Shrink?)
Quick answer: Most cotton muslin bags are machine washable on a gentle, cold cycle with a mild detergent — or hand wash for the gentlest clean. Wash cold and air dry to avoid shrinkage: natural cotton can shrink roughly 5–10% under high heat. Skip bleach, fabric softener and hot dryers.
Cotton drawstring bags are built to be reused for years, and a two-minute care routine keeps them looking new. Here's exactly how to wash, dry and store them — and how to protect printed logos and colored bags.
Can you machine wash cotton muslin bags?
Yes. Most plain, natural cotton bags handle a gentle machine cycle in cold water with a mild, unscented detergent. For heavily used or food-contact bags, a wash bag or laundry net stops the drawstrings from tangling. If a bag is printed, lightly soiled, or you just want to be safe, hand washing is the gentlest option.
Do cotton and muslin bags shrink?
They can. Heat is the main cause of shrinkage — cotton may shrink about 5–10% when washed hot or tumble dried on high. To keep bags true to size, wash in cold or lukewarm water and air dry. This matters most if you're storing something sized to fit, or reordering to match an existing batch. For exact dimensions across our range, see the cotton bag size guide.
How do you hand wash a muslin bag?
- Soak in cool or lukewarm water with a little mild detergent.
- Gently rub any soiled areas — avoid hard scrubbing, which can fray the weave.
- Rinse thoroughly until the water runs clear.
- Press out excess water (don't wring hard) and hang to air dry.
How do you remove stains and odors?
For fresh stains, rinse in cold water first — hot water can set them. A paste of baking soda and water lifts many marks, and a splash of white vinegar in the rinse neutralizes odors. For bags used with food (see our guide to muslin bags in the kitchen), rinse immediately after use before residue dries, and let them dry fully before storing.
Drying and storing
Air drying is best — lay flat or hang on a rack with good airflow. Avoid direct, prolonged sunlight, which can fade natural and colored cotton over time, and avoid high dryer heat, which drives shrinkage. Store bags somewhere dry; damp cotton can develop mildew and odor.
How do you care for printed or colored bags?
To protect a printed logo, turn the bag inside out, wash cold, and air dry rather than tumble drying — heat is what cracks and fades prints. Our colored drawstring bags are color-fast, but washing cold and drying out of direct sun keeps colors richest. Heavier canvas bags follow the same rules and simply take a little longer to air dry.
Frequently asked questions
Can you wash muslin bags in the washing machine?
Yes, most plain cotton muslin bags can be machine washed on a gentle, cold cycle with mild detergent. Use a laundry net to protect the drawstrings, and hand wash printed bags to protect the logo.
Do muslin bags shrink?
They can shrink about 5–10% if washed hot or tumble dried on high heat. Washing in cold water and air drying keeps shrinkage to a minimum.
How do you get stains out of a cotton bag?
Rinse the stain in cold water first, then treat it with a baking-soda paste or a little white vinegar in the rinse. Avoid hot water, which can set stains.
Can you sanitize a muslin bag for food use?
Rinse in hot water right after use, wash on a cold gentle cycle with mild detergent, and air dry fully. Choose unbleached, undyed bags for food contact and wash before first use.
Should you wash cotton bags before using them?
Yes. A first cold wash removes any manufacturing dust and pre-shrinks the fabric slightly, so bags stay true to size afterward.
Stock up on durable, reusable cotton bags
Cared for properly, a good cotton drawstring bag lasts for years of reuse. BAGSGeek makes natural 100% woven cotton bags — single, double, canvas and colored — in every size from 2"×3" to 24"×34", shipped factory-direct in bulk packs.
Want your logo on them? Request a custom order for a factory-direct quote.