Mountain Equipment  Transalp Down Sleeping Bag - Long

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Perfect for overnights in huts or for trips farther away from home, this long-length Mountain Equipment Transalp down sleeping bag is a lightweight bag that helps free up space on your travels.


  • 100% recycled Earthrise shell and lining fabrics are lightweight and downproof with a PFC-free durable water repellent (DWR) that sheds moisture
  • Stitch-through narrow baffle top with stitch-through quilted base
  • Generous, shaped hood
  • 4-baffle, anatomically shaped, offset footbox
  • Mid-level side seams
  • Head-to-toe 65 in. (165 cm) side zipper improves comfort and ventilation
  • Mountain Fit maximizes thermal efficiency
  • Includes a lightweight stuff sack and storage cube
  • Mountain Equipment is a member of Fair Wear Foundation, a European initiative working to improve workplace conditions in the garment and textile industry
  • Closeout


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 Mountain Equipment Backpacking Sleeping Bags

Technical Specs

Item #205587
Best Use


Tested Lower Limit

50 degrees (F) - ISO

Tested Comfort

57 degrees (F) - ISO

Temperature Rating (F)

50 degrees (F)

Temperature Rating (C)

10 degrees (C)


1 pound


Recycled polyester

Zipper Location


Insulation Type



600-fill-power duck down (80% down/20% feathers)

Fill Weight

5 ounces


Recycled polyester

Sleeping Bag Shape


Fits Up To (in.)

79 inches

Shoulder Girth (in.)

31 inches

Hip Girth (in.)


Stuff Sack Size

9 x 4 x 3 inches




Contains recycled materials

4 reviews with an average rating of 4.8 out of 5 stars

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