Filled with 750-fill-power water-resistant duck down, the Sea to Summit Traveller Tr I Sleeping Bag is ideal for fast-and-light backpacking or year-round traveling to hostels and huts.
Fill
750-fill-power duck down
Temperature Rating (F)
50 degrees (F)
- High-loft 750-fill-power down offers superb warmth with minimal weight; Ultra-Dry Down™ water-repellent treatment protects down from moisture
- Ultra-Dry Down is a water-repellent polymer treatment applied to the down; Ultra-Dry Down retains 60% more loft and absorbs 30% less moisture than untreated down
- With a European Norm (EN) lower-limit rating of 50°F, the Sea to Summit Traveller Tr I will keep you comfortable on summertime backpacking adventures
- Traveller Tr I can be zipped together with another Traveller Tr I when you're not alone; Large size will comfortably accommodate 2 people when unzipped and used as a blanket
- Has a lightly tapered shape with collar and foot drawcords that can be cinched down to seal in heat and a create a mummy-shaped bag
- Lightweight ripstop nylon shell can be reversed so either the gray or teal color is on the outside
- Sea to Summit Traveller Tr I Sleeping Bag includes a lightweight Ultra-Sil compression stuff sack and a mesh storage bag
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 | Travel Backpacking |
|---|---|
| Tested Lower Limit | 50 degrees (F) - EN |
| Tested Comfort | 57 degrees (F) - EN |
| Temperature Rating (F) | 50 degrees (F) |
| Temperature Rating (C) | 10 degrees (C) |
| Ultralight | Yes |
| Shell | Ripstop nylon |
| Zipper Location | Left/Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 750-fill-power duck down |
| Lining | Nylon |
| Sleeping Bag Shape | Mummy |
| Shoulder Girth (in.) | Unavailable inches |
| Gender | Unisex |