How to Choose Sleeping Bags for Backpacking
Big Agnes Spike Lake 15 Sleeping Bag
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Ideal for backpacking but versatile enough for couch surfing, the Big Agnes Spike Lake 15 sleeping bag uses water-resistant DownTek™ down and baffle construction for efficient heat distribution.
Shop similar productsKey Details
Fill
600-fill-power DownTek down
Weight
2 lbs. 10 oz.
Compressed Volume
6.6 liters
Temperature Rating (F)
13 degrees (F)
- Unlike many Big Agnes system bags with integrated pad sleeves, the Spike Lake works with any pad size or style
- 600-fill-power DownTek insulation absorbs 30% less water and dries 60% faster than untreated down, and retains significantly more loft than untreated down after getting wet
- Traditional mummy shape allows for light weight and increased thermal value
- Contoured hood follows the shape of your head for a comfortable fit
- Low-profile cordlock lets you un-cinch the hood with one hand
- Breathable shell fabric with a durable water repellent (DWR) finish that fends off moisture and stains
- 65 in. (165cm) YKK #8 zipper with zipper garage
- No-draft collar; no-draft zipper
- Exterior loops for hang drying or storage; liner loops attach a liner to keep it in place (liner not included)
- Mate together left and right zip bags
- Includes a nylon stuff sack and mesh storage sack
- Closeout
Imported.
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 Big Agnes Backpacking 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 | Backpacking |
|---|---|
| Tested Lower Limit | 13 degrees (F) - EN |
| Tested Comfort | 25 degrees (F) - EN |
| Temperature Rating (F) | 13 degrees (F) |
| Temperature Rating (C) | -10.6 degrees (C) |
| Weight | 2 lbs. 10 oz. |
| Shell | Ripstop nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 600-fill-power DownTek down |
| Fill Weight | 21.5 ounces |
| Lining | Nylon taffeta |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | 70 inches |
| Shoulder Girth (in.) | 60 inches |
| Hip Girth (in.) | 54 inches |
| Stuff Sack Size | 8 x 17.5 inches |
| Stuff Sack Volume | 14.43 liters |
| Compressed Volume | 6.6 liters |
| Gender | Unisex |
Buying Advice
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Matt
Carlisle, PA
Pleasantly Surprised!
7 years ago
I was fully prepared to be cold and disappointed. My prior bag (by manufacturer K) fluffs up to twice the thickness of the Spike Lake, but constantly let me down when temps got below 30, even though it's rated to 20. The Spike Lake is rated to 15. I ignored what I thought was a lack of fill, and brought it with me this past weekend - temps were supposed to be in the low 20's. I was pleasantly surprised. The low hit 22, and......I was warm. I slept well. I awoke rested. The down filled yoke gently wrapped around my neck, laying over my shoulders, keeping warm air inside the bag. The zipper snagged a few times, but other than that, this bag's a keeper.
Yes , I recommend this product
Originally posted on bigagnes.com
BC Backpacker.
British Columbia
Disappointment.
7 years ago
Mountain guide in the north west coast of BC. Ive had this bag for one and a half full seasons and i believe I've been cold more nights than I've been warm. On nights that are +8 Celsius, +10. Not a warm bag. I've woken up to it being damp aswell and not repelling a hint of water. Maybe i got one of the bad bags to slip through production. But i do not recommend this bag.
No, I do not recommend this product
Originally posted on bigagnes.com