Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F
A mummy-cut fleece liner built to stretch the range of the sleeping bag you already own. The mummy shape mirrors a real bag's taper, so there are no cold folds of loose fabric to create dead air space, and the fleece face fabric moves moisture away from your base layer instead of trapping it like cotton. Rated to add as much as 27°F of warmth, which is the difference between a 20°F bag being a summer bag and being an actual winter bag.
Check Latest Price on Amazon →Why You Need This
A bad night's sleep can ruin the next day's hike. The Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F ensures you wake up rested and ready, whether you're car camping with the family or backpacking solo.
🏆 How It Compares
Compared to alternatives in the shelter category, the Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F excels with mummy cut matches the taper of a real sleeping bag, so there are no cold air pockets along the sides and adds up to 27°f of warmth — enough to turn a three-season bag into a shoulder-season or light-winter bag. However, keep in mind bulkier and heavier than a silk liner — it takes real pack space and the mummy taper is restrictive for side sleepers who want to pull their knees up — consider whether these factors align with your specific needs before purchasing.
Pros & Cons
✅ Pros
- Mummy cut matches the taper of a real sleeping bag, so there are no cold air pockets along the sides
- Adds up to 27°F of warmth — enough to turn a three-season bag into a shoulder-season or light-winter bag
- Fleece moves moisture away from your base layer far better than cotton, so you wake up dry
- Doubles as a standalone sleeping sack for warm-weather trips when a full bag is overkill
❌ Cons
- Bulkier and heavier than a silk liner — it takes real pack space
- The mummy taper is restrictive for side sleepers who want to pull their knees up
- Fleece wants a gentle wash and air dry, not a hot dryer
🎯 Who Is This For?
Ready to Buy?
Check the latest price and availability on Amazon. Prices are accurate as of the date listed and may change over time.
Check Latest Price on Amazon →Compare with Alternatives
Still weighing options? See the best shelter guidefor the full ranked comparison — price tiers, what we'd skip, and which pick fits a family weekend.
Frequently Asked Questions
What is the Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F best for?
Best for family camping weekends
Who should buy the Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F?
Weekend adventurers looking for reliable outdoor gear Families planning camping trips together Anyone wanting to upgrade their outdoor setup People getting started with weekend wilderness escapes
What problem does the Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F solve?
A bad night's sleep can ruin the next day's hike. The Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F ensures you wake up rested and ready, whether you're car camping with the family or backpacking solo.
What are the drawbacks of the Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F?
Owners and reviewers call out a few trade-offs: Bulkier and heavier than a silk liner — it takes real pack space The mummy taper is restrictive for side sleepers who want to pull their knees up Fleece wants a gentle wash and air dry, not a hot dryer
How much does the Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F cost?
It is listed at $57.98 on Amazon. Prices on Amazon move around, so check the current price before you buy.
What do owners say about the Litume Fleece Sleeping Bag Liner — Mummy Sack, Adds Up to 27°F?
It carries a 4.6-out-of-5 rating from 810 Amazon customer reviews.
Have a question we did not answer? The Amazon listing carries the full spec sheet and customer Q&A.
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