Extremely compact bags designed for maximum warmth and minimal weight.

The Flame Series includes everything from an ultralight liner to an expedition weight mid-winter bag, with a Women's specific shape for efficient insulation.

This is the Women's version of the Spark series. You can explore the Men's specific Spark Series here.

The secret to the impressive performance is a combination
of premium materials and careful design. The RDS 850+
Loft premium goose down, light-gauge #3 YKK zip and high-performance 10D Nylon shell and 7D lining fabrics set the stage
for superior performance. These materials are combined with a
contoured mummy design for efficient insulation, and that mummy
design is then tweaked for each model to best fit the use scenario.

The women’s specific fit is wider at the hip and narrower at the
shoulder and we’ve added extra down overall for increased
warmth.

ULTRA-DRY Down water-repellent treatment protects the
down from external moisture and condensation from the inside
of the bag, virtually eliminating the negative effects moisture has
on down. All Sea to Summit Down Sleeping Bags use Responsible
Down Standard (RDS) certified down. The ULTRA-DRY Down
protection also makes the Flame an impressive hard-alpine or
adventure racing bag, where every gram is counted and down has
never been a viable option.

Specifications

Size Variation

Type	User Height	Weight	Fill Weight	Chest	Hip	Foot
FM 0 - Regular	Up to 170cm	215g	100g	146cm	136cm	88cm
FM 0 - Long	Up to 183cm	250g	115g	152cm	142cm	94cm
FM I - Regular	Up to 170cm	350g		146cm	136cm	88cm
FM I - Long	Up to 183cm	395g		152cm	142cm	94cm
FM II - Regular	Up to 170cm	505g	310g	146cm	136cm	88cm
FM II - Long	Up to 183cm	575g	355g	152cm	142cm	94cm
FM III - Regular	Up to 170cm	665g	440g	150cm	142cm	96cm
FM III - Long	Up to 183cm	745g	495g	155cm	148cm	96cm
FM IV - Regular	Up to 170cm	890g	440g	150cm	142cm	96cm
FM IV - Long	Up to 183cm	995g	495g	155cm	148cm	96cm

Temperature Rating

Type	Comfort	Lower Limit	Extreme
FM 0	13℃	9℃	-4℃
FM I	9℃	4℃	-10℃
FM II	2℃	-4℃	-21℃
FM III	-4℃	-10℃	-29℃
FM IV	-10℃	-17℃	-38℃

EN Rating

The EN13537 is a European standard for sleeping bags that provides three temperature levels to help guide you when choosing a bag.

Comfort: The temperature at which a standard woman can expect to sleep comfortably in a relaxed position. If you are female or consider yourself a cold sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for. We emphasise the Comfort temperature for our women’s specific sleeping bags.

Lower Limit: The temperature at which a standard man can sleep for eight hours in a curled position without waking. If you consider yourself a warm sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for. We emphasise the Lower Limit temperature for all our unisex sleeping bags.

Extreme: This is a survival only rating for a standard woman. Between the lower limit and the extreme rating, a strong sensation of cold must be expected and there is a risk of health damage due to hypothermia. This is an extreme survival rating only; we do not recommend you rely on this rating for normal use.

FM 0

Women’s specific contoured mummy shape for efficient insulation
Ultralight 7D fabrics for minimal weight and packed size
RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
Vertical chest baffles prevent down migration and cold spots.
Ideal for mid-summer fast hikes or adventure racing
Sewn-through box baffle construction to minimise weight and keep down in position
Doubles as a liner to significantly boost the warmth of a second bag
Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: GOOSE DOWN (Min. 90% Down), Stuffsack: 100% Nylon excluding Trims.

Regular

Recommended User Height: 170cm
Bag Weight: 215g
Fill Weight: 100g
Internal Chest Circumference: 146cm
Internal Hip Circumference: 136cm
Internal Foot Circumference: 88cm

Long

Recommended User Height: 183cm
Bag Weight: 250g
Fill Weight: 115g
Internal Chest Circumference: 152cm
Internal Hip Circumference: 142cm
Internal Foot Circumference: 94cm

FM I

Women’s specific contoured mummy shape for efficient insulation
Ultralight 7D and 10D fabrics for minimal weight and packed size
RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
Vertical chest baffles prevent down migration and cold spots.
Ideal for mid-summer fast hikes or adventure racing
Sewn-through box baffle construction to minimise weight and keep down in position
Doubles as a liner to significantly boost the warmth of a second bag
Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: GOOSE DOWN (Min. 90% Down), Stuffsack: 100% Nylon excluding Trims.

Regular

Recommended User Height: 170cm
Bag Weight: 350g
Internal Chest Circumference: 146cm
Internal Hip Circumference: 136cm
Internal Foot Circumference: 88cm

Long

Recommended User Height: 183cm
Bag Weight: 395g
Internal Chest Circumference: 152cm
Internal Hip Circumference: 142cm
Internal Foot Circumference: 94cm

FM II

Women’s specific contoured mummy shape for efficient insulation
Ultralight 7D and 10D fabrics for minimal weight and packed size
RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
Vertical chest baffles prevent down migration and cold spots.
Ideal for mid-summer fast hikes or adventure racing
Sewn-through box baffle construction to minimise weight and keep down in position
Doubles as a liner to significantly boost the warmth of a second bag
Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: GOOSE DOWN (Min. 90% Down), Stuffsack: 100% Nylon excluding Trims.

Regular

Recommended User Height: 170cm
Bag Weight: 505g
Fill Weight: 310g
Internal Chest Circumference: 146cm
Internal Hip Circumference: 136cm
Internal Foot Circumference: 88cm

Long

Recommended User Height: 183cm
Bag Weight: 575g
Fill Weight: 355g
Internal Chest Circumference: 152cm
Internal Hip Circumference: 142cm
Internal Foot Circumference: 94cm

FM III

Women’s specific contoured mummy shape for efficient insulation
Ultralight 7D and 10D fabrics for minimal weight and packed size
RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
Vertical chest baffles prevent down migration and cold spots.
Uses a full box baffle construction to accommodate extra down and reduce cold spots
Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room.
Vertical baffles on chest optimise positions of down to prevent it from moving during use
Full side zip with two sliders provides easy access and extra ventilation options.
Zipper draft tube, hood and front neck draft collar to prevent warmth being lost when it’s needed
Includes a lightweight Ultra-Sil Nano compression bag for compact storage
Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: GOOSE DOWN (Min. 90% Down), Stuffsack: 100% Nylon excluding Trims.

Regular

Recommended User Height: 170cm
Bag Weight: 665g
Fill Weight: 440g
Internal Chest Circumference: 150cm
Internal Hip Circumference: 142cm
Internal Foot Circumference: 90cm

Long

Recommended User Height: 183cm
Bag Weight: 745g
Fill Weight: 495g
Internal Chest Circumference: 155cm
Internal Hip Circumference: 148cm
Internal Foot Circumference: 96cm

FM IV

Women’s specific contoured mummy shape for efficient insulation
Ultralight 7D and 10D fabrics for minimal weight and packed size
RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
Vertical chest baffles prevent down migration and cold spots.
Uses a full box baffle construction to accommodate extra down and reduce cold spots
Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room.
Vertical baffles on chest optimise positions of down to prevent it from moving during use
Full side zip with two sliders provides easy access and extra ventilation options.
Zipper draft tube, hood and front neck draft collar to prevent warmth being lost when it’s needed
Includes a lightweight Ultra-Sil Nano compression bag for compact storage
Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: GOOSE DOWN (Min. 90% Down), Stuffsack: 100% Nylon excluding Trims.

Regular

Recommended User Height: 170cm
Bag Weight: 890g
Fill Weight: 440g
Internal Chest Circumference: 150cm
Internal Hip Circumference: 142cm
Internal Foot Circumference: 90cm

Long

Recommended User Height: 183cm
Bag Weight: 995g
Fill Weight: 495g
Internal Chest Circumference: 155cm
Internal Hip Circumference: 148cm
Internal Foot Circumference: 96cm