How to Clean and Store a Down Sleeping Bag
By Sleeping Bags, Tents, Pads & Outdoor Gear | Published: 2026-10-20
Category: Tips & Care
Learn the right way to wash and store a down sleeping bag to keep it lofty and warm. We cover when to clean, how to dry, and storage mistakes to avoid.
Quick Answer
Wash a down sleeping bag infrequently with a down-specific detergent, dry it thoroughly on low heat with dryer balls, and store it loose in a large cotton or mesh sack—never compressed.
Why down needs different care than synthetic
Down clusters trap warmth by creating loft—the air pockets between feathers. When the down gets dirty or damp, the clusters clump together, flattening those pockets and leaving cold spots. That is why cleaning and storage matter more for a down bag than for a synthetic one: the same insulation that makes it packable and warm is also its weakness.
A zero-degree bag like the Bedrock -20 Long uses 650 fill, RDS Certified water-repellent treated down. That treatment helps shed light moisture, but it does not make the bag waterproof. Regular care keeps the down lofty and the water-repellent finish working, so the bag performs at its rated temperature on the coldest nights.
Diagnose and fix your down bag care problem
- Symptom: Bag smells or has visible dirt: Clean the bag with a down-specific detergent in a front-load washer on a gentle cycle with cool water. Never use top-loaders with an agitator, and skip regular detergent—it strips the natural oils from the down. Check the care tag first; if the shell is not machine-washable, hand-wash in a tub instead.
- Symptom: Down clumps or loses loft after washing: Dry the bag on low heat with a couple of clean tennis balls or dryer balls to break up clumps. Run extra air-only cycles until the down is fully dry and fluffy. If clumps persist, gently pull them apart by hand while the bag is still slightly damp. Never store the bag compressed; hang it loosely or store it in a large cotton storage sack.
- Symptom: Bag smells or has stains after a trip: Spot clean with a down-specific cleaner, then wash the whole bag only if needed. Use a front-loading machine on gentle cycle with cold water and extra rinse. Do not use top-loaders with a center agitator—they can tear baffles and shift down. If the bag still smells after a full wash and dry, the down may need professional cleaning; stop home treatment and consult a specialist.
- Symptom: Bag loses loft or warmth over time: Dry thoroughly on low heat with clean tennis balls or dryer balls to re-fluff the down. Store uncompressed in a large cotton or mesh sack, never stuffed in a compression sack. Check loft before each cold trip; if it stays flat after a proper dry, the down may be past its prime.
- Symptom: Down clumps or smells after a trip: Wash with a down-specific cleaner, rinse until clear, and dry on low with dryer balls. If the bag is heavily soiled or the down is matted beyond recovery, consider professional cleaning or replacement. If clumping persists after a full wash and dry cycle, stop home treatment and take the bag to a professional.
Products mentioned
- Bedrock -20˚ Long: The Bedrock -20 Long is a mummy-style bag with 650 fill, RDS Certified water-repellent treated down and YKK #5 zippers. The water-repellent down resists moisture during cleaning and light use, but it still needs proper washing and drying to keep its loft and warmth at -20°F.
Bedrock -20˚ Long
