- MemBrain Waterproof Shell
- High Warmth to Weight Ratio
- Lightweight at 2 lb 5 oz
- 850+ Fill Goose Down
- 15° Temperature Rating
The Marmot Helium MemBrain with MemBrain® waterproof/breathable fabric and 850+ fill down resists harsh weather and condensation!
It is hard to match Marmot's warmth to weight ratio with certified 850+ fill down. The Helium MemBrain is the ideal three season bag that compresses small and offers full-conditions protection.
Velcro-free face muff gives a nice tight closure with no discomfort. Insulated draft tube keeps cold drafts from getting through the full length zipper. Stuff sack and storage bag included.
Nautilus Hood: the same construction as Marmot's 8000m jacket hood, a 3D hood that wraps around your head and reduces heat loss.
Hood Muff: creates a warm down gasket around your face, keeping the drawcord away from the face.
Stretch Tricot Baffles: allow the bag to be stuffed and unstuffed without tearing the baffle material.
Trapezoid Foot box: matches the shape of your feet, wider in the toe area and narrower in the heels.
Down Fill Oversized Draft Tube: eliminates cold spots
Zipper guard: keeps the draft tube fabric from getting caught in the zipper
Ground Level Seams: top layer wraps fully around the body creating a warm layer of down.
EN Tested:
Comfort Rating: 25.5° F
Comfort Limit: 13.8° F
Extreme Rating: -19.8° F
Regular fits up to 6'. Long fits up to 6' 6".
Insulation: 850+ Goose Down
Shell: MemBrain® 2L 100% Nylon Ripstop 2.3 oz/yd
Lining: 100% Polyester Taffeta DWR 1.0 oz/yd
Max User Height: [Reg] 6'0" [Long] 6'6"
Comfort Rating: 25.5° F
Comfort Limit: 13.8° F
Extreme Rating: -19.8° F
Comfort Rating: Lower limit of comfort range. The temperature at which the person in the sleeping bag is in thermal equilibrium; not feeling cold throughout the entire body. (reference: standard woman in relaxed posture, such as lying on back)
Comfort Limit: Lower limit of comfort range. The temperature at which the person in the sleeping bag is in thermal equilibrium; not feeling cold throughout the entire body. (reference: standard man in curled up body posture)
Extreme Rating: Lower temperature extreme where the risk of hypothermia occurs. Situation of high cold stress, which can be maintained for a limited duration of six hours. (reference: standard woman curled up in the bag to minimise thermal loss through the sleeping bag)
