Sea to Summit Flame FMI Down Sleeping Bag

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The ultralight women's-specific Flame™ Series of sleeping bags are wider at the hip and narrower at the shoulder and are designed to keep you as warm as possible while minimising packed weight and size. They combine more overall ULTRA-DRY Down™ 850+ loft premium goose down, a light-gauge #3 YKK® zip, high-performance 10D nylon shell and 7D lining fabrics and a contoured mummy shape for efficient insulation and superior performance. Other features include a sewn-through construction to shave weight, vertical baffles over the torso for core warmth, a third-length zip and a full hood to keep in your warmth. The Flame FMI is ideal for warm-weather adventures rated at a 9° comfort level.


  • Women's-specific contoured mummy shape for comfort and efficient insulation (narrower at the shoulders, wider between the hips and knees)
  • Sizing provides extra room for both shoulders and hips while still maintaining insulation efficiency
  • Responsible Down Standard 850+ Loft Premium Goose ULTRA-DRY Down™ for maximum insulation value
  • Additional insulation compared to unisex bags, positioned using different body mapping for thermal performance exactly where it is needed
  • Ultralight 7D and 10D fabrics for minimal weight and packed size
  • Vertical chest baffles prevent down migration and cold spots
  • Sewn through box baffle construction to minimise weight and keep down in position
  • 1/3-length zip for gram-saving performance
  • Draft tube prevents heat loss through the zip
  • Includes hood draft collar
  • Includes lightweight Ultra-Sil compression bag and storage cell
  • Ideal for mid-summer fast hikes or adventure racing


Featured Gear Summer Clearance 2024
Fits to 170cm (Regular)
Shoulder Width 73cm (Regular)
Foot Width 44cm (Regular)
Fill ULTRA-DRY Down™ 850+ Loft premium Goose Down (min. 90% down)
Fill Weight 190g (Regular)
Average Weight 350g (Regular)
Outer Material Ultralight 10D Nylon Shell
Inner Material Ultralight 7D Nylon Shell
Temperature Rating 9°C comfort EN13537 rating woman / 4°C Lower comfort EN13537 rating for men

ULTRA-DRY Down™: With the introduction of water-repellent ULTRA-DRY Down™ Seat to Summit have virtually eliminated the negative effects moisture has on down. The ULTRA-DRY Down™ water-repellent treatment protects the down from external moisture and condensation from inside the bag. It is a permanent (no loss of treatment effect has been seen in over 14 wash cycles) Nano-level water repellent polymer treatment applied to Sea to Summit high loft, high quality down. The Nano-thin treatment vastly improves the down's reaction to water without effecting its weight or loft performance. ULTRA-DRY Down™ retains over 60% more loft and absorbs 30% less moisture when compared with untreated down. Sea to Summit sleeping bags dry out 60% faster than bags with untreated down. The Nano-level treatment also inhibits bacterial and microbial growth, which makes Sea to Summit sleeping bags more hygienic and improves their lifespan.

Responsible Down Standard (RDS): The RDS is helping to 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 only using 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 find out more about how the RDS is improving animal welfare during down collection, please visit (link will open a new window).



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