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ATEPA Elements 450 Coldmaster(TM) Mummy Sleeping Bag 42.8degF to 6.8degF
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$139.99
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SKU: atepa-elements-450-coldmaster-mummy-sleeping-bag
Overview
Built for backpackers and campers who need a compact sleep system, this mummy bag is aimed at 3-season use with a temperature range tested from 42.8°F to 6.8°F. Its 700FP recycled down blend and 450g fill are paired with a contoured hood, 3D footbox, draft collar, and adjustable drawstring to help manage warmth in cooler conditions. The included compression sack keeps it easy to stow in a pack or carry-on, while the internal pocket and self-locking anti-snag zipper add practical trail convenience. It is a strong fit for hunters and outdoorsmen who want a lighter, packable bag for camp, but it is not intended to replace a dedicated deep-winter sleep system.
Why Hunters Choose the Atepa
700fp Recycled
Down blend balances warmth and
Rated 6.8°f
For cold-weather camping and alpine
Weighs Just
2.2 pounds, helping keep backpack
Compresses 13.78
X 7.48 inches in the
Mummy Shape,
Contoured hood, and 3D footbox
Key Features
- 700FP Coldmaster(TM) insulation uses a 55% RDS-certified duck down and 45% recycled cotton blend.
- Temperature rating ranges from 42.8°F comfort to 6.8°F lower limit.
- Mummy shape and contoured hood are designed to help reduce cold spots.
- 3D footbox adds room at the feet for sleeping comfort.
- Includes YKK self-locking anti-snag zippers and an internal security pocket.
- Compresses to 13.78" x 7.48" in the included compression sack.
Best Used For
- Backpackers needing a compact sleeping bag for multi-day spring and fall trips.
- Cold-weather campers wanting a mummy bag rated for lower-temperature overnight use.
- Thru-hikers prioritizing low pack weight and small packed size in their kit.
- Travelers and ultralight users who need a compressible bag for limited luggage space.
- Users up to 6'5" seeking a contoured sleeping bag with hood and footbox coverage.
Specifications
| Adjustable Drawstring | Yes |
|---|---|
| Compression Sack Included | Yes |
| Dimensions | 86.6 in x 31.5 in |
| Draft Collar | Yes |
| Fill Material | 55% down + 45% recycled cotton |
| Fill Power | 700FP |
| Fill Weight | 450g |
| Footbox | 3D footbox |
| Hood | Contoured hood |
| Insulation Type | Coldmaster(TM) MIX |
| Internal Pocket | Yes |
| Liner Fabric | 20D 400T nylon |
| Maximum User Height | 6 ft 5 in |
| Packed Size | 13.78 in x 7.48 in |
| Shell Fabric | 15D 480T recycled nylon |
| Storage Bag | Mesh storage bag |
| Temperature Rating Comfort | 42.8 degrees F |
| Temperature Rating Extreme | 6.8 degrees F |
| Temperature Rating Lower Limit | 33.8 degrees F |
| Weight | 2.2 lbs (1 kg) |
| Zipper Type | YKK self-locking anti-snag zippers |
Pros
- 700FP recycled down blend balances warmth and packability for three-season use.
- Rated to 6.8°F for cold-weather camping and alpine conditions.
- Weighs just 2.2 pounds, helping keep backpack loads lighter.
- Compresses to 13.78 x 7.48 inches in the included sack.
- Mummy shape, contoured hood, and 3D footbox help reduce cold spots.
- Includes draft collar, adjustable drawstring, and internal security pocket.
Considerations & Trade-offs
- The mummy shape and contoured hood are designed for a close fit, so it may feel less roomy than rectangular sleeping bags.
- The listed temperature range includes comfort, lower-limit, and extreme ratings, so conditions near the colder end may require careful layering and site selection.
- At 2.2 lbs, it is lightweight for a 3-season bag, but the focus on packability means it is built around backpacking priorities rather than maximum spaciousness.
- The included compression sack is useful for transport, while the separate mesh storage bag suggests the bag should be stored uncompressed to help maintain loft.
Suggested Comparisons
- 3-season mummy sleeping bag
- cold-weather backpacking sleeping bag
- ultralight camping sleeping bag
- sleeping bag compression sack system
Suggested Accessories
- Sleeping bag compression sack
- Sleeping pad
- Sleeping bag liner
- Pillow
Frequently Asked Questions
What temperature range is this sleeping bag rated for?
The listed temperature ratings are 42.8°F tested comfort, 33.8°F tested lower limit, and 6.8°F tested extreme. The description also states it is intended for 3-season use.
What insulation does the ATEPA Elements 450 use?
It uses a 700FP Coldmaster(TM) mix made from 55% RDS-certified duck down and 45% recycled cotton blend.
How small does it pack down?
The packed size is listed as 13.78" x 7.48" in the included compression sack.
How much does it weigh?
The listed weight is 2.2 lbs (1 kg).
What size user is it designed to fit?
The dimensions are listed as 86.6" x 31.5", and the description says it fits users up to 6'5".