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Flame™ Ultralight Women's Sleeping Bag

Five VERSIONS for performance in any season

$229.00 – $549.00

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.

A unisex sleeping bag with a Lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF. The same bag will also have a Comfort limit, in the realm of 32°F, so a woman would be comfortable down to an air temperature of 32ºF. These ratings require a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.

A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.

$299.00
Description

The Flame™ Ultralight Women's Sleeping Bag Series spans everything from an ultralight down-filled liner to a mid-winter fast-and-light sleeping bag. Each model uses premium materials and no-frills design to provide cutting-edge performance for the designed end-use.

The women’s specific fit is narrower at the shoulder and wider at the hip, and features extra down compared to the unisex Spark models.

Is this women's down sleeping bag…?

  • Suitable for cooler temperatures? Yes. You would want the Flame 15°F or possibly the 25°F – either bag will work in late Fall, the 15°F will take you down to early winter temperatures when paired with an adequately insulating sleeping mat.

  • Really suitable as a sleeping bag liner? Yes. You could use the Flame 55°F, or even the Flame 48°F or 35°F to boost the performance of a bag for cold-weather use. Adding one of these to a 20°F / -5°C sleeping bag might make more sense than buying a “0°F / -20°C” sleeping bag for occasional winter use.

  • Able to be zipped to another sleeping bag? No. Even though the 25°F and 15°F have full-length side zippers, they are not designed to be coupled to a sleeping bag with a left zipper.

Read up on the factors which define and affect down quality, and what they mean for you as an end user HERE

Highlights

Best Use

  • Ultralight Backpacking, Sleeping Bag Liner

Performance

  • Sleeping Bag Liner: 55°F (comfort range 55°F to 75°F)
  • Warm Weather: 48°F (comfort range 48° to 68°F)
  • 2 Season: 35°F (comfort range 35°F to 67°F)
  • 2.5 Season: 25°F (comfort range 25°F to 62°F)
  • 3 Season: 15°F (comfort range 15°F to 60°F)

Designed to keep women warm with

  • Down chambers filled using body-mapping to maximize warmth for a woman’s physiology
  • A wider shape between hips and knees to allow you to sleep in a natural position without compressing the down insulation and creating cold spots. 
  • Shorter overall length and narrower girth in shoulders to reduce dead space and increase thermal efficiency

FEATURES

  • ULTRA-DRY Down 850+ Loft 90% Down Cluster Premium Goose Down certified Responsible Down Standard (RDS)
  • 10D shell and 7D liner materials help to achieve the incredible lightweight and compact packed size
  • Includes lightweight Ultra-Sil™ compression bag and storage cell
  • Zipper-length trimmed for gram-saving performance
    • 55°F, 48°F, and 35°F have 1/3-length zippers
    • 25°F and 15°F have full-length side zippers
  • Baffle construction
    • 55°F and 48°F have sewn-through construction.
    • 35°F has baffles in the torso and sewn through in the leg area.
    • 25°F and 15°F are fully baffled.

Technical Features

850+ Loft Ultra-Dry Down™

The highest-lofting down used in any of Sea to Summit’s sleeping bags. 850+ Fill Power indicates that one ounce (30g) of down will re-expand to over 850 cubic inches after compression. Higher loft means that less down can be used to achieve the same temperature rating – important for performance sleeping bags. The loft and down quality/composition are independently tested by the International Down and Feather Laboratory (IDFL) – a copy of the certification is supplied with every Sea to Summit sleeping bag.

 

The down is responsibly sourced and RDS certified and treated with the environmentally-friendly Ultra-Dry Down™ treatment.

 

All of which means you can rest easy.

Responsible Down Standard (RDS)

All Sea to Summit sleeping bags use only down which is certified according to the Responsible Down Standard. The RDS is helping shift the entire down and feather industry towards more humane animal rearing and handling practices. Overseen by the industry leading Textile Exchange, the RDS requires independent, third-party assessments of all aspects of animal rearing and handling throughout the entire supply chain. By using only down that meets the audited requirements of the RDS, we can have confidence that each phase of the collection process has been completed with the welfare and ethical treatment of waterfowl in mind.

To learn more about RDS, visit responsibledown.org

UL 10 Denier Nylon

Despite being incredibly lightweight, the 10 Denier UL Nylon is down-proof and surprisingly durable. A DWR finish helps to shed external moisture. This fabric is part of the secret to making the Spark and Flame Down Sleeping Bag Series some of the lightest, most packable sleeping bags available today.

Women's Specific Shape

Our women's specific bags feature a distinctive shape designed to provide more comfort and the best thermal efficiency. The designs are ideally suited to a woman's shape - slightly narrower in the shoulders and roomier through the hip area. Down distribution is perfectly matched to ensure the torso and the foot areas are kept toasty warm.

Tech Specs

Product Details

Best Use
Ultralight Backpacking, Bike packing, Bike Touring, Liner Bag
Comes With
Ultra-Sil™ compression bag and storage cell
Insulation
Ultra-Dry Down 850+ Loft
Shell Fabric
Ultralight 10D Nylon Shell
Zip Options
Right-side #3 YKK zipper
 
48°F REGULAR
48°F LONG
35°F REGULAR
35°F LONG
25°F REGULAR
25°F LONG
15°F REGULAR
15°F LONG
LINER REGULAR
LINER LONG
BAG SERIES
BAG WEIGHT
COMPRESSED VOLUME (ASTM STD)
COMPRESSION SACK
FILL WEIGHT
FITS UP TO
SEASON RATING
WOMEN'S TEMP (EN RATING)
Flame 1
12.3oz / 350g
1.6 L
XXXS - 2.5L to 1L
6.7oz / 190g
5 ft 7 in / 170 cm
Warm Weather
48°F / 9°C
Flame 1
13.9oz / 395g
2.2 L
XXXS - 2.5L to 1L
7.6oz / 215g
5 ft 10 in / 179 cm
Warm Weather
48°F / 9°C
Flame 2
1lb 1.8oz / 505g
2.9 L
XXS - 3.3L to 1.3L
10.9oz / 310g
5 ft 7 in / 170 cm
2 Season
35°F / 2°C
Flame 2
1lb 4.3oz / 575g
3.8 L
XXS - 3.3L to 1.3L
12.5oz / 355g
5 ft 10 in / 179 cm
2 Season
35°F / 2°C
Flame 3
1lb 7.5oz / 665g
5.3 L
XS - 6L to 2L
15.5oz / 440g
5 ft 7 in / 170 cm
2.5 Season
25°F / -4°C
Flame 3
1lb 10.3oz / 745g
6.3 L
XS - 6L to 2L
17.5oz / 495g
5 ft 10 in / 179 cm
2.5 Season
25°F / -4°C
Flame 4
1lb 15.4oz / 890g
7.1 L
S - 10L to 3.3L
22.9oz / 650g
5 ft 7 in / 170 cm
3 Season
15°F / -10°C
Flame 4
2lbs 3.1oz / 995g
7.9 L
S - 10L to 3.3L
25.7oz / 730g
5 ft 10 in / 179 cm
3 Season
15°F / -10°C
Flame 0
7.6oz / 215g
0.7 L
Stuff Sack
3.5oz / 100g
5 ft 7 in / 170 cm
Sleeping Bag Liner
55°F / 13°C
Flame 0
8.8oz / 250g
1.1 L
Stuff Sack
4.1oz / 115g
5 ft 10 in / 179 cm
Sleeping Bag Liner
55°F / 13°C

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