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- Sea to SummitBreeze Sleeping Bag Liner with Pillow Sleeve and Insect ShieldTop Rated$79.95(15)15 reviews with an average rating of 4.7 out of 5 starsWeight:0.73 lbs
- Big AgnesGreystone 20 Sleeping Bag - Men's$201.93Save 25%compared to $269.95(7)7 reviews with an average rating of 4.3 out of 5 starsTemperature Rating:16 FWeight:2.45 lbsInsulation Type:DownFeatures:Water-Resistant Down
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Read full article: Gear Review: Testing the Exped Terra 15 Sleeping Bag
Read full article: The 9 Best Sleeping Bags for Backpacking of 2025: Staff Picks
How will you be using your liner?
- For backpackers, a mummy-shaped bag liner helps keep your sleeping bag free of dirt and body oils, helping it last longer. A liner can also be used in place of a sleeping bag in hot climates.
For travelers, a rectangular bag liner or travel sheet keeps you separated from bedding of questionable cleanliness or with possible bedbug infestations.
Which liner material is right for you?
- Silk: Very lightweight, compact and insulates in cold weather. Absorbent and breathable in warm weather. Price: moderate to expensive.
- Cotton: Strong, durable and absorbent, but not the lightest or most compact. Price: economical.
- Fleece and microfleece: Warmer, heavier, soft, moisture-wicking and quick-drying, but the mid- and heavyweight varieties are bulky. Price: moderate.
- Synthetics (e.g., CoolMax®): Moisture-wicking, breathable, ideal for humid conditions and stretchy for restless sleepers. Price: moderate.
- Insulated (e.g., Thermolite®): Adds enough warmth to greatly extend the range of a lightweight bag. It dries faster than cotton. Price: moderate to expensive.
Understand temperature ratings
Opt for a sleeping bag with a temperature rating below the lowest nighttime temperature you expect when camping.
Choose a sleeping bag shape
There are four main shapes: rectangular, semirectangular, mummy and double. Generally, you want one that gives you room to stretch.
Select synthetic or down insulation
- Synthetic is more affordable, dries faster and provides warmth when damp.
- Down is lightweight, durable and compresses small.
Consider other features
A waterproof shell, snug-fitting hood, extra zippers and even a stash pocket can add durability, warmth and function.
Read full article: Sleeping Bag Buying Guide: How to Choose the Right One for Camping
Read full article: The Best Budget Sleeping Bags of 2025: Tested
Read full article: Sleeping Bags vs. Quilts: Which is Right for You?
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Frequently asked questions about sleeping bags
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At REI Co-op, we carry a wide range of sleeping bags that can start under $100 with some higher-end brands and models costing over $1000.






