Great for weekend warriors and new campers, the feature-packed and value-oriented synthetic Sea to Summit Trailhead ThIII 20 sleeping bag is no slouch when it comes to performance.
Fill
Synthetic
Weight
Regular Wide: 3 lbs. 6.6 oz.
Temperature Rating (F)
20 degrees (F)
- Tapered rectangular shape offers more space and comfort than a traditional mummy bag
- Full-length #5 YKK zip allows bag to open out flat and be used as a quilt
- Second zip slider in footbox offers versatile ventilation
- WaveLoft™ construction creates extra warmth and loft
- Lining fabric attached to shell prevents tangles
- Oversize zip draft tubes feature antisnag material
- 30-denier nylon shell treated with durable water repellent (DWR) and 20-denier nylon lining are lightweight and compressible fabrics
- Includes stuff sack
- Note: This bag is not designed to zip with another
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 | 20 degrees (F) - EN |
| Tested Comfort | 31 degrees (F) - EN |
| Temperature Rating (F) | 20 degrees (F) |
| Temperature Rating (C) | -7 degrees (C) |
| Weight | Regular Wide: 3 lbs. 6.6 oz. |
| Shell | 30-denier nylon |
| Zipper Location | Left |
| Insulation Type | Synthetic |
| Fill | Synthetic |
| Sleeping Capacity | 1-person |
| Lining | 20-denier nylon |
| Sleeping Bag Shape | Semirectangular |
| Fits Up To (in.) | Regular Wide: 72 inches |
| Shoulder Girth (in.) | Regular Wide: 68 inches |
| Hip Girth (in.) | Regular Wide: 63 inches |
| Stuff Sack Size | Unavailable |
| Stuff Sack Volume | Unavailable |
| Compressed Volume | Unavailable |
| Gender | Unisex |