Mummy Sleeping BagAtepaSold by BroadOut

Atepa

ATEPA DENALI 520 Down Sleeping Bag-Mummy

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Mummy-style Sleeping

Diagonal zipper design for easier

90/10 White

FP650+ loft and 520g filling

Temperature Scale

Listed as 1°C / -4°C

200 X

A 35 x 18 cm

Lightweight 1kg

Build for easier carrying on

$179.99
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SKU: atepa-denali-520-down-sleeping-bag-mummy

Overview

Built for backcountry nights where warmth, packability, and ease of use matter, this mummy-style sleeping bag is aimed at hunters and outdoor travelers who need a compact sleep system without extra bulk. It combines a 90/10 white duck down fill with a 3D chest collar, cap opening windshield, and zipper windproof wall to help hold warmth in colder conditions, while the diagonal zipper and fully openable side and bottom zippers add flexibility at camp. The 1 kg weight and 35 x 18 cm packed size make it easier to carry on longer approaches, and the 200 x 75 x 50 cm dimensions provide a more generous fit than many minimalist bags. Practical details like the drawstring brim, anti-pinch zipper features, hanging loops, and included storage bag round out a design focused on efficient use in the field.

Why Hunters Choose the Atepa

Light 1kg

Packed weight supports easier transport

90/10 White

Duck Down FP650+ fill is

Diagonal Zipper

Design makes entry and exit

Fully Openable

Side and bottom zippers add

3d Chest

Collar and cap-opening windshield add

Key Features

  • Mummy-style sleeping bag with diagonal zipper design for easier entry and exit.
  • 90/10 white duck down fill with FP650+ loft and 520g filling.
  • Temperature scale listed as 1°C / -4°C / -20°C.
  • 200 x 75 x 50 cm size with a 35 x 18 cm packed size.
  • Lightweight 1kg build for easier carrying on outdoor trips.
  • 100% Nylon 15D outer fabric, lining, and carry bag.
  • Features a 3D chest collar, windshield cap opening, and anti-pinch zipper details.

Best Used For

  • Cold-weather hunters needing a lightweight mummy bag for backcountry camps and pack-in trips
  • Outdoor enthusiasts who want a compact sleeping bag that balances warmth and portability
  • Campers looking for adjustable features like drawstring brim, full-open zippers, and wind protection
  • Users who prefer a down-filled bag with a roomy 200x75x50cm size for overnight comfort
  • Hunters and travelers needing easy drying, storage, and packing after repeated field use

Specifications

Anti Pinch Pull TabYes
Anti Pinch Zipper ChainYes
BrimDrawstring
Built In Zipper PocketYes
Cap Opening WindshieldYes
Carry Bag100% Nylon 15D
Chest Collar3D chest collar
DrawstringFlat rope drawstring
Feet Hanging EarsTwo
Filling90/10 White Duck Down FP650+520g
Lining100% Nylon 15D
Outer Fabric100% Nylon 15D
Packaged Size35x18cm
Quilting DesignDiagonal quilting design
Side And Bottom ZippersFully openable
Size200x75x50cm
Storage BagGauze storage bag
Temperature Scale1AdegC / -4AdegC / -20AdegC
Weight1kg
Zipper DesignDiagonal zipper design
Zipper TypeYKK zipper with double-opening self-locking mechanism
Zipper Windproof WallYes

Pros

  • Light 1kg packed weight supports easier transport on backcountry trips.
  • 90/10 White Duck Down FP650+ fill is specified for warmth.
  • Diagonal zipper design makes entry and exit more convenient.
  • Fully openable side and bottom zippers add versatility in camp.
  • 3D chest collar and cap-opening windshield add insulation details.
  • Includes YKK zipper features and a gauze storage bag.

Considerations & Trade-offs

  • The mummy shape and 200x75x50cm dimensions prioritize warmth and packability, but they offer less room to move than a roomier sleeping bag style.
  • At 1kg, it is lightweight for carrying, yet the down fill and feature set are still geared toward users who want a more insulated sleep system than a minimal summer bag.
  • The temperature scale is listed as 1AdegC / -4AdegC / -20AdegC, so buyers should verify which rating best matches their intended conditions before relying on it for a trip.
  • The diagonal zipper, fully openable side and bottom zippers, and added windproof details improve usability, but they also add complexity compared with a simpler sleeping bag design.

Suggested Comparisons

  • Down sleeping bags
  • Mummy sleeping bags
  • Cold-weather sleeping bags
  • Backpacking sleeping bags

Suggested Accessories

  • Sleeping pad
  • Compression sack
  • Pillow
  • Tent footprint

Frequently Asked Questions

What temperature range is listed for the DENALI 520 Sleeping Bag?

The product lists a temperature scale of 1°C / -4°C / -20°C. No additional explanation is provided in the source data about what each value represents.

What are the listed materials and fill for this sleeping bag?

The source data lists a 100% Nylon 15D outer fabric, 100% Nylon 15D lining, and 90/10 White Duck Down FP650+ filling at 520g. The carry bag is also listed as 100% Nylon 15D.

How portable is the DENALI 520 for backcountry use?

It is listed at 1kg packed weight with a packaged size of 35x18cm. That makes it relatively compact in the provided specifications, but no further portability claims are given.

What closure and comfort features are included?

The description lists a diagonal zipper design, YKK zipper with double-opening self-locking mechanism, zipper windproof wall, anti-pinch zipper chain, 3D chest collar, windshield at the cap opening, and a brim drawstring. It also mentions fully openable zippers on the sides and bottom.

Does the product data say whether this bag is suitable for wet conditions or extreme cold?

The source data does not provide verified claims about wet-weather performance, moisture resistance, or suitability for specific field conditions. It only lists the materials, down fill, and temperature scale.