How to Choose Sleeping Bags for Backpacking
Sea to Summit Hamelin Synthetic 15F Sleeping Bag
$196.00 – to $206.00
A cozy choice for backpacking, the Sea to Summit Hamelin Synthetic 15°F sleeping bag tackles varied climates and damp conditions with ease, thanks to its water repellency and body-mapped warmth.
Key Details
Fill
Synthetic insulation
Weight
Regular: 3 lbs. 9.4 oz.
Long: 4 lbs. 0.8 oz.
Temperature Rating (F)
15 degrees (F)
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- Thermally efficient Contour shape offers room to move in any sleeping position and is optimal for side sleepers
- Strategically placed Revive Loft insulation for thermal regulation
- RCS-certified recycled fabrics and insulation; shell has a non-PFAS durable water repellent (DWR) to repel moisture
- Free Flow full-length side zipper with double sliders enables custom ventilation and can unzip to convert the bag to a quilt
- Wear this bag around at camp: Simply close the snaps at the shoulders and open the footbox zipper
- YKK #5 zippers with zipper plow provide reliable, snag-free operation
- Draft collar around the neck and draft tube along the zipper to prevent cold air from getting in
- The Hamelin sleeping bag is part of the Sea to Summit 1% for the Planet commitment
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 Sea to Summit 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 | 15 degrees (F) - ISO |
| Tested Comfort | 24 degrees (F) - ISO |
| Temperature Rating (F) | 15 degrees (F) |
| Temperature Rating (C) | -9 degrees (C) |
| Weight | Regular: 3 lbs. 9.4 oz. Long: 4 lbs. 0.8 oz. |
| Shell | 50-denier 300T recycled polyester pongee with Cire and C0 durable water repellent (DWR) finishes |
| Zipper Location | Left/Right |
| Insulation Type | Synthetic |
| Fill | Synthetic insulation |
| Fill Weight | Regular: 2 lbs. 10.7 oz. Long: 3 lbs. 0.5 oz. |
| Sleeping Capacity | 1-person |
| Lining | 50-denier 300T recycled polyester taffeta with Cire and C0 DWR finishes |
| Sleeping Bag Shape | Semirectangular |
| Fits Up To (in.) | Regular: 73 inches Long: 78 inches |
| Shoulder Girth (in.) | Regular: 62.2 inches Long: 66.1 inches |
| Hip Girth (in.) | Regular: 62.2 inches Long: 66.1 inches |
| Stuff Sack Size | Unavailable |
| Stuff Sack Volume | 26 liters |
| Compressed Volume | Unavailable |
| Gender | Unisex |
| Sustainability | Contains recycled materials |
Buying Advice
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Robert W.
Large, Heavy and No Practical Use. . . Pass
2 months ago
[This review was collected as part of a promotion.] I waited to write this review until I had used this bag a few times, but my initial impression of disappointment remained unchanged. . . The bag has an interesting zipper config that works well, but that is the only pro going for it. . . The bag is too large and heavy for any practical use other than an inhome sleepover or maybe car-camping. The bag does not compress well and is cumbersome. The bags size and weight to heat rating is horrible. The shape is odd and the zippers rub your elbows. I am sorry Sea to Summit, but this bag is a major swing and a miss. Hard Pass on this one and I hope Sea to Summit will do better going forward.
Originally posted on Sea to Summit
Craig V.
Better than Expected!
2 months ago
[This review was collected as part of a promotion.] I have owned a wide variety of sleeping bags in my 50+ years of hiking / bike touring. For the money, this bag is hard to beat. Well thought out, with many extra features - from the double zip to the fold open/ quilt stye, to the hang loops to help facilitate drying. I love my down bags, but when the forecast calls for rain, I will always pack a synthetic filled bag. Posted temp range is spot on - with just an ensolite / foam pad, and a light base layer, I slept comfortable down into the mid 30s.
Originally posted on Sea to Summit
Paul B.
Great roomy bag
2 months ago
[This review was collected as part of a promotion.] I used the 15 degree bag and enjoyed it. This bag is roomy. I slept well as a broad-shouldered 72' man, which is not the norm. I've spent 15 nights in it in temps ranging from 20s to 50s. It was comfortable in all temps, with plenty of venting options if it was too warm and mummy option for the cooler nights. The full zip allowed me to get some fresh air cleansing. I don't have any cons to speak of. Happy to add it to my sleeping quiver.
Originally posted on Sea to Summit
Tony S.
Great roomy , and warm
3 months ago
[This review was collected as part of a promotion.] Used this recently for several days with low temperatures around forty, and actually opened the bag to be cool enough. I’m claustrophobic so the extra room is appreciated too. Well built and well designed.
Originally posted on Sea to Summit
Bobby F.
Hamelin sleeping bag
3 months ago
[This review was collected as part of a promotion.] Very good quality however the comfort is lacking. It's formed in a way to be closer to the body but it's very difficult to move around in. I wish it was wider
Originally posted on Sea to Summit
Josh S.
Solid
2 months ago
[This review was collected as part of a promotion.] I really like the space in this bag. It's roomy and compresses well for a synthetic. Good options for ventilation👍
Originally posted on Sea to Summit