MISS JULIA 4-season goose down mummy sleeping bag, 230cm extra-long, 2500g fill, comfort rating -13℉ to 64℉, lightweight and water-resistant
MISS JULIA SLEEPING BAGS MJ30021
Lightweight Adults Sleeping Bag
winter sleeping bag
Mummy Sleeping Bag

4-Season Goose Down Mummy Sleeping Bag – Comfort Rating -13℉ to 64℉, Waterproof, Lightweight & Packable

SKU: MJ30021-1
$88.90
$106.80
$88.90
Recommended Height: Up to 6 ft 9 in (205 cm)
Colors: Light Green
Comfort Rating: 59℉ – 64℉ (15 – 18℃)
Subtotal: $88.90
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MISS JULIA 4-season goose down mummy sleeping bag, 230cm extra-long, 2500g fill, comfort rating -13℉ to 64℉, lightweight and water-resistant

4-Season Goose Down Mummy Sleeping Bag – Comfort Rating -13℉ to 64℉, Waterproof, Lightweight & Packable

$106.80 $88.90

4-Season Goose Down Mummy Sleeping Bag – Comfort Rating -13℉ to 64℉, Waterproof, Lightweight & Packable

$106.80 $88.90
Recommended Height: Up to 6 ft 9 in (205 cm)
Colors: Light Green
Comfort Rating: 59℉ – 64℉ (15 – 18℃)

Product Overview

The MISS JULIA 4-season goose down mummy sleeping bag is designed for campers and backpackers who need reliable warmth, lightweight performance, and comfort across a wide range of outdoor conditions.

With adjustable fill options up to 2500g, this sleeping bag provides a comfort temperature range from 64℉ to -13℉ (18℃ to -25℃), making it suitable for spring, autumn, and cold winter camping when used with appropriate gear.

Its extra-long 230 cm design ensures a comfortable fit for taller users, while premium materials and thoughtful construction deliver dependable insulation and durability for outdoor adventures.

Comfort Temperature Rating

Overall Comfort Rating:
64℉ to -13℉ (18℃ to -25℃)

            Comfort Rating refers to the temperature range at which an average adult can sleep comfortably under standard outdoor conditions.
Actual comfort may vary depending on clothing, sleeping pad, weather, wind, humidity, and individual cold tolerance.

Comfort Rating by Fill Weight

 Fill Weight Comfort Rating
400 g 59℉ – 64℉ (15 – 18℃)
600 g 41℉ – 50℉ (5 – 10℃)
800 g 32℉ – 41℉ (0 – 5℃)
1000 g 23℉ – 32℉ (-5 – 0℃)
1200 g 14℉ – 23℉ (-10 – -5℃)
1500 g 5℉ – 14℉ (-15 – -10℃)
2000 g -4℉ – 5℉ (-20 – -15℃)
2500 g -13℉ – -4℉ (-25 – -20℃)


Size & Fit

  • Sleeping Bag Length: 230 cm (Extra Long)

  • Recommended User Height: Up to 6 ft 9 in (205 cm)

MISS JULIA SLEEPING BAGS MJ30021

The extra-long 230 cm design provides additional footroom and improved insulation efficiency, making it ideal for tall campers and side sleepers.

Key Features

  • 4-Season Versatility: Adjustable warmth based on fill weight selection

  • Comfort Rated Down to -13℉ (-25℃): Suitable for cold-weather camping

  • Extra Long Design: Designed for tall users up to 205 cm

  • Premium Goose Down Fill: Excellent warmth-to-weight ratio

  • Water-Resistant Shell: Protects against moisture and condensation

  • Ergonomic Mummy Shape: Reduces heat loss and improves thermal efficiency

  • Extra Insulated Footbox: Keeps feet warm in cold conditions

  • Lightweight & Packable: Easy to carry with included compression bag


Materials & Construction

  • Fill Material: Selected White Goose Down (Odor-Free)

  • Outer Shell: 400T 20D Nylon – Water-Resistant & Breathable

  • Lining Material: 400T 20D Pongee – Soft, Skin-Friendly & Durable

  • Closure Type: YKK Zipper, Velcro, Adjustable Drawstring Hood

The inner lining rebounds quickly after compression, helping the sleeping bag maintain loft and warmth over time. 

Design for Camping & Backpacking

This lightweight mummy sleeping bag is designed with extra insulation in the footbox and a cinched hood to minimize heat loss. The durable ripstop-style shell enhances longevity, making it a reliable choice for camping, hiking, backpacking, and cold-weather outdoor use. 

Packed Size & Portability

Each sleeping bag includes a storage and compression bag for convenient packing and transport.

Packed size may vary depending on fill weight, compression method, and packing technique.

Suitable Use Scenarios

  • Camping

  • Backpacking

  • Hiking

  • Autumn & winter outdoor activities

  • Cold-weather travel

  • Emergency outdoor use

Package Includes

  • 1 × Goose Down Sleeping Bag

  • 1 × Storage / Compression Bag

Care & Storage

For long-term storage, avoid keeping the sleeping bag compressed. Store it loosely in a breathable storage bag or hang it in a dry place to maintain loft and extend product lifespan.

Frequently Asked Questions(FAQ)

Q: What is the lowest comfort temperature of this sleeping bag?
A: With the 2500g fill option, the lowest comfort rating is -13℉ (-25℃).

Q: Is this sleeping bag waterproof?
A: The outer shell is water-resistant and breathable, suitable for light rain and condensation, but not for full water immersion.

Q: Is this sleeping bag suitable for tall users?
A: Yes. The extra-long 230 cm design fits users Up to 6 ft 9 in (205 cm) tall.

Q: Can I use this sleeping bag for backpacking?
A: Yes. It is lightweight, compressible, and includes a compression bag for easy transport.

Q: What does Comfort Rating mean?
A: Comfort Rating indicates the temperature range at which an average adult can sleep comfortably under standard outdoor conditions.


MISS JULIA 4-season goose down mummy sleeping bag, 230cm extra-long, 2000g fill, comfort rating -13℉ to 64℉, lightweight and water-resistant
Adjustable cinched hood and YKK zipper of MISS JULIA 4-season goose down sleeping bag
MISS JULIA 4-season goose down mummy sleeping bag used for camping and backpacking outdoors, 230cm, 2500g fill
Extra-insulated footbox of MISS JULIA 4-season mummy sleeping bag, 230cm long, 2500g goose down, for cold-weather comfort
Close-up of soft 400T20D pongee lining and selected white goose down filling of MISS JULIA sleeping bag
Side view of MISS JULIA 4-season goose down mummy sleeping bag, 230cm, 2500g fill, showing water-resistant 400T20D nylon shell

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Certifications & Standards – Trusted Quality You Can Rely On

Learn more about the certifications behind MISS JULIA sleeping bags: RDS Responsible Down Standard and EN 13537 Sleeping Bag Temperature Ratings.

FAQs

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  • Sizing & Fit
  • Temperature Rating & Warmth
  • Materials & Construction
  • Packing & Portability
  • Use & Care
  • Consistency & Standards

Sizing & Fit

Recommended height refers to the maximum user height that a sleeping bag is designed to fit comfortably while maintaining proper insulation, hood coverage, and footbox loft.

MISS JULIA calculates recommended height based on sleeping bag length, shape (mummy, semi-rectangular, or rectangular), hood design, footbox structure, and down loft expansion, not just the external measurement.

Sleeping bags require internal allowance for:

Hood structure and head movement

Footbox space and insulation loft

Natural sleeping posture

Warmth retention in cold conditions

For this reason, the usable interior length is always slightly shorter than the total sleeping bag length.

Mummy sleeping bags are designed to closely follow the body for maximum warmth.

Because of their contoured hood and tapered footbox, mummy designs require additional internal space, which results in a slightly lower recommended height compared to semi-rectangular or rectangular sleeping bags of the same length.

Yes.

If your height is at or near the listed maximum, we recommend choosing a longer size or a semi-rectangular or rectangular sleeping bag, especially for cold-weather or winter camping.
This helps ensure comfort and insulation efficiency.

Temperature Rating & Warmth

Comfort rating indicates the temperature range at which an average adult can sleep comfortably under normal outdoor conditions.

MISS JULIA lists comfort ratings in Fahrenheit (primary) with Celsius as a secondary reference to ensure clarity for international customers.

Fill weight determines the amount of insulation inside the sleeping bag.

Higher fill weight provides:

Greater loft

Better heat retention

Lower comfort temperature

This allows users to select the appropriate warmth level for different seasons and climates.

Yes.

MISS JULIA uses conservative, real-world-based comfort ratings rather than exaggerated extreme values.

Our ratings are designed to reflect practical outdoor performance, not laboratory extremes.


Yes.

Many MISS JULIA sleeping bags feature two-way zippers and fully openable designs, allowing them to be used as a blanket in warmer conditions.

Proper ventilation extends the usable temperature range.

Materials & Construction

Depending on the model, MISS JULIA uses selected goose down or duck down, processed to be clean, odor-free, and durable.

High-quality down provides an excellent warmth-to-weight ratio and long-lasting loft.

Fill power measures the loft and quality of down.

Higher fill power means:

Better insulation

Lighter weight

Improved compressibility

MISS JULIA sleeping bags typically use high fill power down (750+ FP to 800+ FP).

MISS JULIA sleeping bags use water-resistant and breathable nylon shell fabrics such as 380T or 400T 20D nylon.

They are designed to resist moisture and condensation but are not fully waterproof and should not be submerged.

Packing & Portability

After use, simply place the sleeping bag into the compression sack and tighten the straps.

Once compressed, the packed size becomes very compact, similar to the product images shown, making it easy to carry for travel, camping, or backpacking.

Each MISS JULIA sleeping bag includes a high-quality compression stuff sack made from durable Oxford cloth with a double-layer PU coating.

This design provides water resistance, durability, and long-term protection during outdoor use.

Yes.

The compression sack features heavy-duty stitching and four reinforced compression straps, designed to withstand repeated tightening and long-term outdoor use.

Absolutely.

The compression system significantly reduces packed volume, allowing you to free up backpack space for other essential gear.

This makes MISS JULIA sleeping bags ideal for backpacking, hiking, and multi-day outdoor trips.

Use & Care

MISS JULIA sleeping bags are designed for a wide range of activities, including:

Camping

Backpacking

Hiking

Biking

Outdoor travel

Emergency or survival use

They are suitable for both outdoor and indoor use depending on fill weight and season rating.

For travel, use the included compression sack.

For long-term storage, we recommend removing the sleeping bag from the compression sack and storing it loosely in a dry, breathable environment to maintain down loft.

How To Store? Click here

We recommend gentle hand washing or professional down cleaning.

Avoid harsh detergents and ensure the sleeping bag is fully dried before storage.

How To Wash? Click here

Consistency & Standards

Yes.

MISS JULIA applies the same standards for recommended height, temperature rating, materials, and construction across product pages, images, metafields, and Google Shopping feeds.

MISS JULIA prioritizes real-world comfort, safety, and long-term performance over marketing exaggeration.

Our specifications are designed to provide reliable outdoor performance you can trust.