How to Choose Sleeping Bags for Backpacking
Marmot Lost Coast 40 Sleeping Bag
$179.00 – to $199.00
Made with 600-fill-power down for warmth and packability, this Marmot sleeping bag has a mummy shape to keep you cozy. The internal stash pocket gives you a spot to keep your headlamp or phone handy.
Key Details
Fill
600-fill-power down with Down Defender
Weight
Regular: 2 lbs. 3 oz.
Long: 2 lbs. 2.4 oz.
Compressed Volume
Regular: 3.2 liters
Long: 4.8 liters
Temperature Rating (F)
40 degrees (F)
- Certified 600-fill-power down with Down Defender for improved performance in wet conditions
- Recycled shell and lining fabrics reduce environmental impact
- Main zipper with antisnag slider provides added ventilation and easy access
- Anatomic footbox with wraparound construction increases warmth
- Internal stash pocket
- Draft tube to prevent heat loss
- ISO tested for reliable temperature rating
- Stuff sack and storage bag included
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 Marmot 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 | 36 degrees (F) - ISO |
| Tested Comfort | 44 degrees (F) - ISO |
| Temperature Rating (F) | 40 degrees (F) |
| Temperature Rating (C) | 4 degrees (C) |
| Weight | Regular: 2 lbs. 3 oz. Long: 2 lbs. 2.4 oz. |
| Shell | 100% postconsumer recycled polyester |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 600-fill-power down with Down Defender |
| Fill Weight | Regular: 11.28 ounces Long: 12.41 ounces |
| Sleeping Capacity | 1-person |
| Lining | 100% postconsumer recycled polyester |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Regular: 72 inches Long: 78 inches |
| Shoulder Girth (in.) | Regular: 65 inches Long: 67 inches |
| Hip Girth (in.) | Regular: 62.6 inches Long: 64.6 inches |
| Stuff Sack Size | 6.3 x 11.8 inches |
| Stuff Sack Volume | 6 liters |
| Compressed Volume | Regular: 3.2 liters Long: 4.8 liters |
| Gender | Unisex |
| Sustainability | Contains recycled materials |
