Product Image of color Denim/Navy loading
Denim/Navy
Sea to Summit Trek TkII 18 Sleeping Bag
$349.00 – to $369.00
With a tapered rectangular shape that offers more room than a mummy bag, the Sea to Summit Trek TkII sleeping bag keeps you warm via water-resistant, RDS-certified 650-fill-power down.
Fill
650-fill-power Ultra-Dry down
Weight
Regular: 2 lbs. 2 oz.
Long: 2 lbs. 6 oz.
Compressed Volume
Regular: 6.1 liters
Long: 7.3 liters
Temperature Rating (F)
18 degrees (F)
- Water-repellent, 650-fill-power Ultra-Dry Down™ retains 60% more loft and absorbs 30% less moisture than untreated down; down is also PFC-free and RDS-certified
- Responsible Down Standard (RDS) ensures the down does not come from animals that have been subject to any unnecessary harm, such as force-feeding or live-plucking
- Tapered rectangular shape offers more space than a traditional mummy bag while maintaining thermal efficiency
- Nylon shell fabric is treated with a durable water repellent (DWR) finish that sheds moisture and helps block wind
- Vertical chest baffles prevent down migration and 3D sidewall baffle maximizes loft right to the edge of the bag to prevent cold spots
- 2-way #5 YKK® side and foot zippers let you ventilate as needed; oversized zip draft tube keeps out the drafts, while antisnag materials make for smooth zipping
- 3D hood draws in tight to keep you cozy; neck collar draft tube seals in warmth
- 20-denier lining fabric is lightweight and soft on your skin
- Internal security pocket keeps nighttime essentials close at hand
- Comes with an Ultra-Sil™ compression sack and a nylon storage sack
- This bag is designed to zip together with another to create a double bag
Imported.
Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. 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. Ratings are based on a person wearing one long underwear layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.View all Sea to Summit Men's Sleeping BagsBest Use Backpacking
Tested Lower Limit 18 degrees (F) - EN
Tested Comfort 30 degrees (F) - EN
Temperature Rating (F) 18 degrees (F)
Temperature Rating (C) -7.8 degrees (C)
Weight Regular: 2 lbs. 2 oz.
Long: 2 lbs. 6 oz.
Shell 30-denier nylon
Zipper Location Left
Insulation Type Down
Water-Resistant Down Yes
Fill 650-fill-power Ultra-Dry down
Fill Weight Regular: 1 lb. 2 oz.
Long: 1 lb. 4 oz.
Lining 20-denier nylon
Sleeping Bag Shape Semirectangular
Fits Up To (in.) Regular: 72 inches
Long: 76 inches
Shoulder Girth (in.) Regular: 60 inches
Long: 64 inches
Hip Girth (in.) Regular: 57 inches
Long: 62 inches
Stuff Sack Size Unavailable
Stuff Sack Volume Regular: 10 liters
Long: 14 liters
Compressed Volume Regular: 6.1 liters
Long: 7.3 liters
Gender Unisex
Sustainability Down certified to the Responsible Down Standard (RDS)
Loading Reviews... Loading Questions...