How to Choose Sleeping Bags for Backpacking
Sea to Summit Hamelin Synthetic 30F Sleeping Bag
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A cozy choice for backpacking, the Sea to Summit Hamelin Synthetic 30°F sleeping bag tackles varied climates and damp conditions with ease, thanks to its water repellency and body-mapped warmth.
Shop similar productsKey Details
Fill
Synthetic insulation
Temperature Rating (F)
30 degrees (F)
- 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
- This 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 | 30 degrees (F) - ISO |
| Tested Comfort | 37 degrees (F) - ISO |
| Temperature Rating (F) | 30 degrees (F) |
| Temperature Rating (C) | -1 degrees (C) |
| Shell | 50-denier 300T recycled polyester pongee with Cire an C0 durable water repellent (DWR) finishes |
| Zipper Location | Left/Right |
| Insulation Type | Synthetic |
| Fill | Synthetic insulation |
| Sleeping Capacity | 1-person |
| Lining | 50-denier 300T recycled polyester taffeta with Cire and C0 DWR finishes |
| Sleeping Bag Shape | Semirectangular |
| Stuff Sack Size | Unavailable |
| Stuff Sack Volume | 20 liters |
| Compressed Volume | Unavailable |
| Gender | Unisex |
| Sustainability | Contains recycled materials |
