How to Choose Sleeping Bags for Backpacking
Marmot Always Summer 40 Sleeping Bag - Men's
$139.73 – to $154.73Save up to 29%
Filled with highly packable, 650-fill-power down for just-right warmth on cool nights, the men's Marmot Always Summer 40° sleeping bag offers luxurious quiltlike comfort while backpacking or camping.
Key Details
Fill
650-fill-power duck down
Weight
Regular: 1 lb. 12.6 oz.
Long: 1 lb. 14.7 oz.
Temperature Rating (F)
40 degrees (F)
- Certified 650-fill-power down with Down Defender to improve water resistance in wet conditions
- Dual side half zippers for easy access
- Extended zipper flaps to provide extra blanketlike coverage when unzipped
- Footbox zipper opens when you want extra space and closes for extra warmth
- Recycled shell and lining fabrics for a sustainable choice
- Internal stash pocket
- ISO-tested for reliable temperature rating
- Stuff and storage sack 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 | 37 degrees (F) - ISO |
| Tested Comfort | 46 degrees (F) - ISO |
| Temperature Rating (F) | 40 degrees (F) |
| Temperature Rating (C) | 4 degrees (C) |
| Weight | Regular: 1 lb. 12.6 oz. Long: 1 lb. 14.7 oz. |
| Shell | 20-denier 100% recycled nylon ripstop |
| Zipper Location | Left/Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 650-fill-power duck down |
| Fill Weight | Regular: 7.8 ounces Long: 9.9 ounces |
| Sleeping Capacity | 1-person |
| Lining | 20-denier 100% recycled nylon taffeta |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Regular: 72 inches Long: 78 inches |
| Shoulder Girth (in.) | Regular: 64 inches Long: 65 inches |
| Hip Girth (in.) | Regular: 59.1 inches Long: 59.8 inches |
| Stuff Sack Size | Regular: 7.5 x 16.1 inches Long: 8.7 x 18.1 inches |
| Stuff Sack Volume | Regular: 25 liters Long: 36.7 liters |
| Gender | Men's |
Buying Advice
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2 months ago
great summer bag
I used this bag hammock camping for a week in Michigan this summer. The coolest night we had was around 50 degrees and I was warm enough using this bag and an older thermarest pad underneath. It packs down really small and puffs right back up- I was initially worried wince you can see through the fabric, but I have no complaints. The only thing to consider is that since the bag doesn’t unzip past about waist height, it’s a little more difficult to get into and out of in a hammock. Being able to sleep with it unzipped when the weather was warmer is a fine trade-off though.
1 month ago
Location:Oahu Hawaii
Age:25–34
4 weeks ago
great for warm weather
Yes , I recommend this product
I bought this and I have used it for a little glamping by camping on the beach. This sleeping bag is perfect for the warm weather the zips go down super low as well I’m 5’7 and if I unzip them they can go down to my upper hips which make it super comfortable and breathable. I also like how you can unzip the bottom to get a little bit more leg room
Age:25–34
Location:IL
Age:35–44
1 month ago
I like it!
Yes , I recommend this product
pretty nice bag. I was lucky to get it on sale plus a member discount. I like that it has zippers on both sides. so you can be in it but also have the bag feel more like a blanket when not fully zipped.
Age:35–44