How to Care for a 20-Degree Sleeping Bag

By Rumpl | Published: 2026-10-18

Category: How-to Guides

Keep your 20-degree sleeping bag performing well with these care steps. Learn how to wash, dry, store, and maintain loft for longer life.

Quick answer

Wash your 20-degree sleeping bag only when needed using a front-loading machine and gentle detergent, then dry it on low heat with dryer balls to restore loft. Store it loose in a large cotton sack, not compressed.

Why care matters for a 20-degree bag

A 20-degree sleeping bag relies on its insulation loft to trap body heat. Dirt, oils, and compression crush that loft over time, reducing warmth. Regular care keeps the bag performing at its rated temperature.

What not to do

Avoid dry cleaning — the chemicals damage synthetic fills and strip natural oils from down. Never store a sleeping bag stuffed in its compression sack for more than a trip. That permanently compresses the insulation.

Step-by-step care guide

Spot clean first: Use a damp cloth and mild soap to wipe off mud, food, or stains. Avoid rubbing hard — that pushes dirt deeper into the fibers. Only wash the whole bag when spot cleaning isn't enough. Most bags need a full wash only once or twice per season.
Wash in a front-loader: Set the machine to a gentle cycle with cold or warm water (no hot). Use a tech-wash detergent — never fabric softener. Run an extra rinse cycle to remove all soap residue. Top-loaders with an agitator can tear the shell or shift insulation. If you only have a top-loader, take the bag to a laundromat with front-load machines.
Dry on low heat with dryer balls: Tumble dry on low or no heat. Add two or three clean tennis balls or wool dryer balls to break up clumps of insulation. Stop and fluff the bag by hand every 20 minutes. Drying can take 1–3 hours depending on the bag's size and fill. The bag is fully dry when the insulation feels fluffy and no clumps remain — never store it damp.
Store loose, not compressed: Keep the sleeping bag in a large cotton or mesh storage sack, or hang it in a closet. The compression sack is only for transport. Long-term compression crushes the loft and creates permanent thin spots. A bag stored compressed for months may lose up to half its insulating power.
Air out after every trip: Unzip the bag fully and hang it inside out for a few hours before storing. This releases moisture and body oils that accumulate overnight. A quick airing between uses reduces the need for washing. Letting the bag breathe also prevents mildew and odors.

Products to consider

Wrap Sack 20° Sleeping Bag - Cascade Fade: The Wrap Sack 20° Sleeping Bag introduces a first-of-its-kind blanketing layering system that lets you choose your comfort setting. Because you can adjust the layer for temperature changes, proper care helps maintain the loft of each layer so the system works as intended.
Wrap Sack 20° Sleeping Bag - Cascade Fade