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Can't decide between a sleeping bag or quilt for your trip? The 30°/15° ALPS Mountaineering Trance System is a quilt with footbox paired with a TechLoft Micro mummy bag for overnight comfort.
Fill
TechLoft Micro synthetic fibers
Weight
4 lbs. 6 oz.
Compressed Volume
8.5 liters
Temperature Rating (F)
15 degrees (F)
30 degrees (F)
Features
Sleep system functions as a 15° mummy bag, a 30° mummy bag or a standalone quilt
Removable quilt top with enclosed footbox
Mummy bag with TechLoft Micro synthetic insulation provides warmth, loft and compactness
2-layer offset construction and a contoured, hooded mummy shape help maximize warmth on chilly nights
#8 separating zippers offer smooth operation
Insulated chest and zipper baffles help combat heat loss
High-quality nylon ripstop shell fabric and soft polyester liner offer durability and comfort
Includes an 8 x 15 in. compression stuff sack
Closeout
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.