Naturehike Ultralight Envelope Sleeping Bag
- Maximum Height Recommendation: 80.7 inches
- Occupancy: 1 Person
- Shape: Envelope
- Size: Large
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A genuinely light, small-packing bag that earns its keep on mild to cool trips; pair it with a liner and a ground pad once temperatures approach the 40s.
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ASIN: B071XXR2Y8Model: NH21MSD04Category: Sleeping Bags
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Overview
The Naturehike NH21MSD04 is an envelope-style backpacking sleeping bag rated 59F to 32F, filled with 80g per square meter imitation silk cotton, and it compresses into a 13 x 31cm sack at 1.68 lbs for hikers who count grams.
Naturehike lists a 32F low end, but owners treat this as a warm to cool three-season bag rather than a true near-freezing one, often adding a liner once nights drop into the 40s. The 80.7 x 33.5 inch cut runs roomy for an average adult, and a two-person version exists that fits over a queen air mattress with two pillows included.
- Weighs 1.68 lbs / 0.76 kg
- Compresses to roughly 13 x 31 cm
- 80.7" L x 33.5" W interior
- 80 g/m2 imitation silk cotton fill with compression sack
Who it's for
Backpackers, travelers, and car campers who want to save weight and pack volume on spring through fall trips. Not the right choice for anyone counting on it alone for near-freezing overnight temperatures.
Pros and cons
- Packs down small at about 1.68 lbs
- Roomy 80.7 x 33.5 inch cut for average adults
- Durable zippers and reinforced seams
- Unzips flat to use as a blanket
- Warmth below about 40-45f is inconsistent per owners
- Thin without a pad or liner on cold ground
- Taller or larger sleepers may find it snug
Performance notes
The imitation silk cotton fill keeps bulk down while the double-reinforced seams and tested zippers hold up to repeated packing and use.
Specifications
| Brand | Naturehike |
|---|---|
| Model | NH21MSD04 |
| Dimensions & fit | |
| Maximum Height Recommendation | 80.7 inches |
| Size | Large |
| Item Weight | 1.68 pounds |
| Item Dimensions L x W | 80 × 34 inches |
| Capacity & performance | |
| Age Range Description | Adult |
| Construction & materials | |
| Fill Material Type | Polyester |
| ShellMaterial | Nylon |
| Material | Polyester |
| Fabric Type | Nylon |
| Color | Navy Green |
| Included components | |
| Unit Count | 1 |
| Number of Packs | 1 |
| Included Components | Compression Sack |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Occupancy | 1 Person |
| Shape | Envelope |
| Closure Type | Zipper |
| Sport Type | Camping & Hiking |
| Number of Items | 1 |
| Seasons | All Seasons |
| Additional Features | Lightweight, Zipper |
| Item Type Name | Sleeping Bag |
Frequently asked questions
How warm is the Naturehike NH21MSD04 sleeping bag really?
It is rated 59F to 32F, and owner experience matches that for spring through fall use, but several found it thin once temperatures approached the 40s and recommend a liner for colder nights.
How small does the Naturehike NH21MSD04 pack down?
It compresses into an included sack about 13 x 31 cm and weighs roughly 1.68 lbs, small enough that one reviewer fit it inside a daily backpack.
Is the Naturehike NH21MSD04 roomy enough for a taller adult?
At 80.7 inches long and 33.5 inches wide it fits an average adult comfortably, though one larger reviewer noted it could feel tight.