Sleeping Bag Buying Guide: How to Choose the Right One for Camping
Mammut Siku Fiber -6F/-21C Sleeping Bag - Women's
$226.73Compared to $349.95*Save 35%
Designed for comfort in extreme conditions, the women's Mammut Siku Fiber -6°F/-21°C Sleeping Bag is made with lightweight insulation and a special material to prevent noise for restful sleep.
Key Details
Weight
5 lbs. 4 oz.
Compressed Volume
26 liters
Temperature Rating (F)
-6 degrees (F)
- The head and foot area have a waterproof membrane
- Intuitive climate regulation with a central 2-way zipper
- Improved YKK zipper prevents jamming of material
- Insulated covering along the zipper to enhance climate comfort and protect from cold bridges
- Zipper garage reduces cold areas at the end of the zipper
- PFC-free durable water repellent (DWR) treatment
- Lining made from 100% recycled polyester
- Comfortable, soft fabric in the hood reduces noise and increases comfort
- Insulation chamber around the hood opening protects against cold and wind
- Easy-to-use magnetic closure on the thermal collar
- Drawstring for easy adjustment of the hood and thermal collar
- Inner pocket for storing valuables
- Revised anatomic footbox for greater comfort without extra weight
- Includes a deep-sleep mask and earplugs to reduce light and noises
- Comes with a stuff sack
- Standard-tested according to EN ISO 23537-1:2016
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Mammut Camping Sleeping BagsEach bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
| Best Use | Camping |
|---|---|
| Tested Lower Limit | -6 degrees (F) - EN |
| Tested Comfort | 9 degrees (F) - EN |
| Temperature Rating (F) | -6 degrees (F) |
| Temperature Rating (C) | -21 degrees (C) |
| Weight | 5 lbs. 4 oz. |
| Shell | 100% polyester |
| Zipper Location | Front |
| Insulation Type | Synthetic |
| Fill Weight | 3 lbs. 15.6 oz. |
| Sleeping Capacity | 1-person |
| Lining | 55% polyamide/45% polyester |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | 70.86 inches |
| Shoulder Girth (in.) | 60 inches |
| Hip Girth (in.) | 51 inches |
| Stuff Sack Size | 13.39 x 12.2 inches |
| Stuff Sack Volume | 29 liters |
| Compressed Volume | 26 liters |
| Gender | Women's |
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2 months ago
Mega komfortabler Schlafsack
Der gemütlichste Schlafsack den ich je hatte. Die Armlöcher und der mittige Reißverschluss sind einfach nur toll. Länge ist super, aber an der Breite könnte man ein bisschen sparen. Trotz des hohen Gewichts ist mir das für den Komfort absolut wert. Ich hab mit vielen Lagen bei -10C darin geschlafen und es ist dann schon ein wenig frisch geworden, aber auch sehr verfroren, ich denke die Temperaturangabe trifft auf die meisten Menschen zu.
Review originally posted on Mammut
Age:25–34
6 months ago
Good but wish it packed down more
So far I'm very pleased with this bag and it seems like it will do good in lower temps, but so far only went about 35°. Only issue is i wish is packed down smaller, it is massive and took up the majority of my 65 L bag even when in a compression sack.
Age:25–34
Age:25–34
2 weeks ago
Great for over night trips, not long hauls.
Yes , I recommend this product
I have a few very cold nights under my belt and wanted to give my 2 cents (for what it's worth) on this sleeping bag. My first criticism of this bag, as others have noted, is it's pack down size. It is a BIG sleeping bag. It also weighs a fair amount. I went for a couple nights with a 60+5 liter backpack and it barely fit. The first night it was about 7 degrees F which, based on Mammut's website, is the comfort rating but it felt JUST under comfortable. I slept with my base layers on only but my downfall was my sleeping pad with a rating of only 3.6R. The next trip, I took a much warmer sleeping pad at 8.5, and at night the temperature got down to about 8 degrees F. Even with the warmer sleeping pad, I slept with not only my base layers on, but also a puffy jacket. I felt warm enough, but with what I was wearing in the sleeping bag, I feel it should have slept a lot warmer then it did. The zipper baffle let in some cold air and could use a bigger baffle. Otherwise, it is still a very quality sleeping bag, I love the magnetic clasp at the neck and with a summer rated down quilt for layering, I believe this bag can handle much more than I threw at it.
Age:25–34