Quick answer
To keep your sleeping bag warm, wash it only when necessary using a gentle detergent, dry it thoroughly with low heat, and store it loose in a large cotton sack rather than stuffed tight.
Why loft matters for warmth
A sleeping bag keeps you warm by trapping still air inside its insulation. Over time, dirt, body oils, and compression flatten the fibers, reducing that trapped air and making the bag less effective. Proper care restores the loft, which is the fluffiness that holds warm air.
Down vs. synthetic care differences
Down bags need special detergent to remove oils without stripping natural insulation. Synthetic bags can handle regular mild soap but are more sensitive to high heat in the dryer. The Rumpl Wrap Sack 20° Sleeping Bag, available in prints like Watercolor Glow and Baja Fade, uses a synthetic fill that balances warmth and packability. For this bag, avoid fabric softener and bleach, which can degrade the fibers over time.
How to care for your sleeping bag: 6 steps
- 1. Spot clean when possible: Use a damp cloth with mild soap to wipe small stains. This avoids full washes that stress the insulation. Check the bag’s care tag first—some stains may need a specific treatment.
- 2. Wash only when needed: Machine wash on a gentle cycle with cold water and a down-specific or synthetic-safe detergent. Use an extra rinse to remove all soap residue. Over-washing strips oils that help the insulation trap air, so limit to once or twice per season.
- 3. Dry on low heat with dryer balls: Set the dryer to low heat and add two or three clean tennis balls or dryer balls. They break up clumps and restore loft. Stop when the bag is fully dry—damp insulation loses warmth. Check the loft by feeling the bag’s thickness; if it feels flat, continue drying in 15-minute increments.
- 4. Store loosely, not compressed: Keep the bag in a large cotton or mesh storage sack, not the tight stuff sack. Compression flattens fibers and reduces warmth over time. If you don’t have a storage sack, use a pillowcase or a large breathable bag.
- 5. Fluff before every trip: Take the bag out of storage and shake it vigorously to redistribute insulation. This restores loft before you pack it for the trail. If the bag feels lumpy, give it a few minutes in the dryer on no heat with dryer balls.
- 6. Air out after each use: Hang the bag unzipped overnight after a trip to let moisture and odors escape. This prevents mildew and keeps the fill fresh. Avoid storing a damp bag—hang it in a well-ventilated area away from direct sun.
Product facts
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Wrap Sack 20° Sleeping Bag - Watercolor Glow: The Wrap Sack 20° Sleeping Bag uses a blanketing layering system rather than a constricting mummy shape. Its roomy design means you can layer clothing or a liner inside without compressing the insulation, helping maintain loft and warmth.
Wrap Sack 20° Sleeping Bag - Watercolor Glow
