Bringing the comfort of a tapered-rectangular shape and the versatility of a dual-zip ventilation system, the Sea to Summit Trek Tk I 30 down sleeping bag will keep you warm and snug on chilly nights.
Fill
650-fill-power duck down
Weight
Regular: 1 lb. 10.8 oz.
Compressed Volume
Regular: 4.6 liters
Temperature Rating (F)
30 degrees (F)
- Full-length YKK #5 main side zipper and footbox zipper let you increase ventilation and allow the bag to be used as a comforter
- Shaped hood and oversized zipper draft tubes seal in warmth and keep cold out
- 3D hood draws in tight when needed
- Internal pocket for phone, GPS or valuables
- Baffled top and stitch-through base construction
- Durable 30-denier nylon shell; soft-touch 20-denier lining fabric is lightweight and highly breathable
- All fabrics and treatments are PFC-free
- Includes a lightweight Ultra-Sil compression bag and storage cell
- Form a snug double sleeping bag by zipping this bag to any Sea to Summit Altitude, Journey or Venture sleeping bag (not 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 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 | 40 degrees (F) - ISO |
| Temperature Rating (F) | 30 degrees (F) |
| Temperature Rating (C) | -1 degrees (C) |
| Weight | Regular: 1 lb. 10.8 oz. |
| Ultralight | Yes |
| Shell | Nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 650-fill-power duck down |
| Fill Weight | Regular: 12.3 ounces |
| Lining | Nylon |
| Sleeping Bag Shape | Semirectangular |
| Fits Up To (in.) | Regular: 72 inches |
| Shoulder Girth (in.) | Regular: 59 inches |
| Hip Girth (in.) | Regular: 59 inches |
| Stuff Sack Volume | 10 liters |
| Compressed Volume | Regular: 4.6 liters |
| Gender | Unisex |