Sea to Summit Flame FmIII Women Long


Weight: 752 g

1 in stock

his is our top choice sleeping bag for Nordic conditions!

Sea to Summit has been improving their Flame series bags year after year. User voices have been heard, and new the new bags have e.g. a longer zipper and wider cut. The bags still have an excellent balance of lightness and features, thanks to the ultralight fabrics. The bags have a 10D shell material and 7D liner material, and top quality 850 cuin hydrophobic down. Light materials result to a small pack size as well. With the weight of 752 g it is lighter than many comparable temperature quilts. Sleeping bags with similar warmth-to-weight ratio are very rare to come by in the market.

The temperature ratings of Flame FmIII are perfect for three-season hikes in Northern climate.

Engineered for women to provide extra warmth where needed, our Flame is what you reach for when you need a high performance sleeping bag but don’t want to be weighed down by one. The Flame Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.

Ultra-light and technical, our Flame Series bags are designed to keep you as warm as possible while minimising packed weight and size. 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.

Women’s specific contoured mummy shape for efficient insulation
Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room
Updated sizing provides extra room for both shoulders and hips while still maintaining insulation efficiency
Includes lightweight Ultra-Sil Nano compression bag for compact storage

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 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.

  • Ultralight 7D fabrics for minimal weight and packed size
  • RDS 850+ Loft Premium Goose ULTRA-DRY Down for maximum insulation value
  • 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 optimises positions of down to prevent it 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
  • Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: GOOSE DOWN (Min. 90% Down), Stuffsack: 100% Nylon excluding Trims

Weight: 752 g

Fill weight 495 g

Fits users up to 179 cm

Temperature range:

  • Comfort: -4 °C
  • Limit: -10 °C
  • Extreme: -29 °C
Weight 752 g


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