描述
Cold does not care how much you spent on a tent. It moves through fabric, settles under a sleeping pad and finds the space between a shoulder and a hood. The AEGISMAX mummy bag is built around that reality: 95 percent white goose down rated to FP800, held in place by offset baffles and a side block baffle so the fill cannot migrate away from the body during the night.
The shell is iFlex 15D nylon with a DWR finish and a high-density down-proof weave, inner and outer, with a differential cut shell and 3D side walls that give the down room to loft without being flattened by the liner. The rated comfort range reaches from minus 10 to minus 20 degrees C, which places the bag in genuine winter territory rather than a three-season compromise. Two bags can be spliced together for couples, and the range runs from G1 through G5 in M and L lengths, so the fill weight can be matched to the trip rather than guessed at.
Down is chosen for reasons that survive contact with a pack: warmth per gram, compressibility and a service life measured in seasons rather than washes. For alpine work, winter car camping or a long-distance hike where every gram is argued over, this is the layer that decides whether the night is recoverable.
Warmth is not a luxury item. It is the difference between a morning that starts and one that does not.
Key Features
- ✦ 95 percent white goose down fill rated to FP800
- ✦ Offset baffles and side block baffle to prevent down migration
- ✦ Differential cut shell with 3D side walls for full loft
- ✦ iFlex 15D nylon shell with DWR and high-density down-proof weave
- ✦ Comfort rating between minus 10 and minus 20 degrees C
- ✦ Splicing design to join two bags into a double
- ✦ Five fill grades, G1 to G5, in M and L lengths
Technical Specifications
- Type: Cold weather mummy sleeping bag, winter rated
- Filling: 95 percent white goose down, FP800
- Shell fabric: iFlex 15D nylon with DWR, down-proof weave
- Inner fabric: iFlex 15D nylon, soft skin-facing finish
- Baffle construction: Offset baffles plus side block baffle
- Comfort temperature: minus 10 to minus 20 degrees C
- Length options: Lengthened, suits 1.8 m to 2 m user height
- Sizes: M and L
- Configurations: G1 to G5 fill grades, single or spliced double
- Customisation: Available on request
Application Scenarios
Winter mountaineers match a G4 or G5 fill grade to exposed bivouac nights where the temperature holds below freezing for hours. Motorcycle tourers and car campers pick the mid grades for late-season trips where a three-season bag fails in February. Couples splice two bags for shared warmth without the weight penalty of a double. Long-distance hikers carry the lighter G1 and G2 grades for shoulder-season routes where pack weight is the limiting factor, and expedition leaders issue differing grades across a team based on each person's cold tolerance.
Frequently Asked Questions
Q: How cold can this bag be used?
The comfort scale spans minus 10 to minus 20 degrees C, which places it in winter and exposed shoulder-season use rather than three-season camping.
Q: What does FP800 mean?
It is the fill power of the 95 percent white goose down, a measure of how much volume a given weight of down lofts, and therefore how much warmth it holds per gram.
Q: What stops the down from shifting to one side?
The bag uses offset baffles plus a side block baffle, and a differential cut shell with 3D side walls, so the fill stays distributed around the body.
Q: Can two bags be joined?
Yes. The design supports splicing, so two bags can be zipped into a double for shared use.
Q: Which size should I choose?
The lengthened cut suits users from 1.8 m to 2 m in height and is offered in M and L, with fill grades G1 through G5 covering warm through severe conditions.
Q: How should the bag be stored between trips?
Store it loose in a breathable storage sack rather than compressed, so the FP800 goose down keeps its loft and the baffles keep their shape between seasons.
Q: Will it suit a user around 1.9 m tall?
The lengthened cut is designed for users from 1.8 m to 2 m in height, offered in M and L with fill grades G1 through G5.








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