Ideal for the backcountry but also useful for couch surfing, the long Big Agnes Spike Lake 15 sleeping bag uses water-resistant DownTek™ down and a baffle construction for effective warmth.
Fill
600-fill-power DownTek down
Weight
2 lbs. 13 oz.
Compressed Volume
7.4 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. 13 oz. |
| Shell | Nylon ripstop |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 600-fill-power DownTek down |
| Fill Weight | 22.5 ounces |
| Lining | Nylon taffeta |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | 78 inches |
| Shoulder Girth (in.) | 62 inches |
| Hip Girth (in.) | 56 inches |
| Stuff Sack Size | 8 x 17.5 inches |
| Stuff Sack Volume | 14.43 liters |
| Compressed Volume | 7.4 liters |
| Gender | Unisex |