Sleeping BagAtepaSold by BroadOut

Atepa

ATEPA BULWARK 300 Down Sleeping Bag-Envelope With Hood 53.6degF to 26.6degF

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

Envelope-style Sleeping

Hood for weekend camping comfort

Temperature Range

Listed as 53.6°F to 26.6°F

300g Down

Mixed cotton for warmth and

Side Bottom

Zippers allow use as a

20d 400t

Downproof, water-repellent treatment

$119.99
View on BroadOut

You'll be taken to BroadOut to complete your purchase.

Hunter's Outpost earns a commission from affiliate links at no extra cost to you.

SKU: atepa-bulwark-300-down-sleeping-bag-envelope-with-hood

Overview

Built for weekend-style camping, this envelope sleeping bag is aimed at hunters and outdoor users who want a flexible sleep system rather than a minimalist mummy bag. It can be used as a sleeping bag, blanket, or cushion cover thanks to the side and bottom zippers, while the hood, adjustable drawstring, and zipper wind-blocking strip add practical comfort in cooler conditions. The 300g down-and-cotton fill is paired with 20D 400T recycled nylon taffeta and a water-repellent finish, giving it a balanced mix of warmth, packability, and easy care. At 1.15 kg, it is a straightforward option for base camp, vehicle camping, or any trip where comfort and versatility matter more than shaving every ounce.

Why Hunters Choose the Atepa

Versatile 3-in-1

Design can be used as

Side Bottom

Zippers add flexible use options

300g Down

Cotton filling is designed for

Adjustable Drawstring

Brim helps tailor the fit

Compression Outer

Bag supports easier packing and

Key Features

  • Envelope-style sleeping bag with hood for weekend camping comfort.
  • Temperature range listed as 53.6°F to 26.6°F.
  • 300g down filling with mixed cotton for warmth and breathability.
  • Side and bottom zippers allow use as a blanket or cushion cover.
  • 20D 400T recycled nylon taffeta with downproof, water-repellent treatment.
  • Includes a 210D Oxford cloth compression outer bag for storage and portability.
  • Adjustable drawstring brim and zipper wind-blocking strip add user control.

Best Used For

  • Weekend campers wanting a versatile sleeping bag that can also serve as a blanket or cushion cover.
  • Hunters needing a compact, hooded sleep system for cool-weather overnight trips and base camps.
  • Outdoor users who value adjustable comfort features like a drawstring brim and zipper wind-blocking strip.
  • Travelers or car campers looking for easier packing with the included compression outer bag.
  • Users seeking a roomy sleeping bag with added foot space for more relaxed overnight comfort.

Specifications

BreathabilityYes
Collar Zipper TabYes
Compression Bag210D Oxford cloth compression outer bag
DrawstringAdjustable drawstring
Easy To CleanYes
Fabric20D 400T Recycled Nylon Taffeta (Downproof treated, WaterRepellent Grade 4)
FillingColdmaster(TM) Down 300g
Foot CompartmentThree-dimensional foot compartment
LiningContrasting color lining
Lower Piece UseCushion cover
Moisture ProofYes
QuiltingNew quilting thread design
Storage Size30 x 17 cm / 11.8 x 6.7 in
StructureInverted trapezoidal structure
Temperature Range12AdegC/7AdegC/-3AdegC (53.6AdegF/44.6AdegF/26.6AdegF)
Unfolded Size78.7 x 33.5 inches
Upper Piece UseSingle blanket
Use Type3-in-1 sleeping bag
Water RepellentYes
Weight1.15 kg (2.5 lbs)
Windproof DesignZipper wind-blocking strip
ZippersSide and bottom zippers

Pros

  • Versatile 3-in-1 design can be used as a sleeping bag, blanket, or cushion cover.
  • Side and bottom zippers add flexible use options for camp setup.
  • 300g down and cotton filling is designed for warmth and breathability.
  • Adjustable drawstring brim helps tailor the fit to changing conditions.
  • Compression outer bag supports easier packing and storage.
  • Three-dimensional foot compartment adds extra room for comfort.

Considerations & Trade-offs

  • Temperature range is broad enough to suit milder nights and cooler conditions, but it is not a substitute for a dedicated cold-weather sleeping bag when temperatures drop further.
  • The envelope-with-hood design and multi-use zipper setup add versatility, but that also means it is less streamlined than a simpler, single-purpose bag.
  • At 1.15 kg (2.5 lbs), it is portable for its class, though not the lightest option if minimizing pack weight is the top priority.
  • The 20D 400T recycled nylon taffeta and water-repellent treatment offer practical protection, but the product is still best treated as outdoor gear that benefits from careful use and storage.

Suggested Comparisons

  • Sleeping bags with hood
  • Envelope sleeping bags
  • Down sleeping bags
  • Camping blankets or quilt-style sleep systems

Suggested Accessories

  • Sleeping pad
  • Compression sack
  • Sleeping bag liner
  • Camp pillow

Frequently Asked Questions

What temperature range is listed for the ATEPA BULWARK 300 sleeping bag?

The listed temperature range is 12°C / 7°C / -3°C, which is shown as 53.6°F / 44.6°F / 26.6°F.

Can this sleeping bag be used in more than one way?

Yes. The description says it is a 3-in-1 sleeping bag, with the upper piece usable as a single blanket and the lower piece usable as a cushion cover. It also notes side and bottom zippers for separate use as a blanket or cushion cover.

What are the packed and unfolded sizes?

The storage size is listed as 30 x 17 cm / 11.8 x 6.7 in, and the unfolded size is 78.7 x 33.5 inches.

What materials are specified in the product data?

The fabric is listed as 20D 400T recycled nylon taffeta with downproof treatment and a water-repellent grade 4 finish. The filling is listed as Coldmaster(TM) Down 300g, and the description also mentions 300g 90 white duck down plus renewable cotton.

What portability features are included?

The product includes a 210D Oxford cloth compression outer bag for storage and portability, and the listed weight is 1.15 kg / 2.5 lbs.