How to Choose Sleeping Bags for Backpacking
Sea to Summit Trek TkI 30 Sleeping Bag
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For adventurers looking for maximum versatility at a moderate price, the Sea to Summit Trek TkI 30 sleeping bag offers traditional comfort and value, with an anything but traditional design approach.
Shop similar productsKey Details
Fill
650+ UltraDry down
Temperature Rating (F)
30 degrees (F)
- Tapered rectangular shape offers comfort and versatility
- 650-fill-power Loft UltraDry Down™ certified to the Responsible Down Standard (RDS) offers insulation and compressibility
- Vertical chest baffles prevent down migration and cold spots
- 3D side-wall baffle maximizes loft right to the edge
- 3D hood draws in tight when needed
- 2-way #5 YKK side and foot zips provide ventilation
- Oversize zip draft tube features antisnag material; neck collar draft tube seals out cold drafts
- Large internal security pocket
- Soft-touch 20-denier lining fabric is lightweight and highly breathable; 30-denier nylon shell is durable
- Includes Ultra-Sil™ compression bag for compact storage
- This bag is designed to zip with another (second sleeping bag sold separately)
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) - EN |
| Tested Comfort | 41 degrees (F) - EN |
| Temperature Rating (F) | 30 degrees (F) |
| Temperature Rating (C) | -1 degrees (C) |
| Shell | 30-denier nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 650+ UltraDry down |
| Lining | 20-denier nylon |
| Sleeping Bag Shape | Semirectangular |
| Stuff Sack Size | Unavailable |
| Stuff Sack Volume | Unavailable |
| Compressed Volume | Unavailable |
| Gender | Unisex |
| Sustainability | Down certified to the Responsible Down Standard (RDS) |
