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Sea to Summit Flame FmIII Down Sleeping Bag - Womens (-4C)

Sea to Summit Flame FmIII Down Sleeping Bag - Womens (-4C)
$649.00 - $679.00
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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 mummy fit is narrower at the shoulder and wider at the hip, and features extra down compared to the unisex Spark models. The wider mummy shape between hips and knees allows you to sleep in a natural position without compressing the down insulation and creating cold spots. The bags shorter overall length and narrow shoulder girth helps reduce dead spaces and increase thermal efficiency

Bag Fill - 850+FP RDS Goose Down
Bag Weight - 665g (Regular size)

  • 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
    • Full-length side zipper
  • Baffle construction
    • Fully Baffled along the entire length of the bag

Best Use

Ultralight Backpacking


Bikepacking, Bike touring


3 Seasons

Temperature Rating


Comfort Limit


Lower Limit




Insulation Type

850+ Fill Power Ultra Dry


RDS Goose Down

Bag Weight

Regular: 665g / 1.47lbs


Long: 745g / 1.64bs

Fill Weight

Regular: 440g / 15.5oz


Long: 495g / 17.5oz

Fits to User Height

Regular: 170cm / 5’7”


Long: 179cm / 5’10”

Girth – Shoulder

Regular: 150cm / 59”


Long: 155cm / 61”

Girth - Hip

Regular: 142cm / 56”


Long: 148cm / 58”

Girth - Foot

Regular: 90cm / 35”


Long: 94cm / 38”

Compressed Volume

Regular – 5.3L


Long – 6.3L


Sea to Summit Flame Series Sleeping Bags

Part Numbers

Option UPC MPN Store SKU
Regular 9327868095490 S3231 SLE615133910
Long 9327868095506 S3232 SLE585885380