1 imageWestern Mountaineering Terralite Sleeping Bag, 25F/-4C, LZ, Navy Blue, 5ft. 6in., 56TERRALZ
Western Mountaineering Terralite Sleeping Bag, 25F/-4C, LZ, Navy Blue, 5ft. 6in., 56TERRALZ
Western Mountaineering Terralite Sleeping Bag, 25F/-4C, LZ, Navy Blue, 5ft. 6in., 56TERRALZ
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Product Info for Western Mountaineering Terralite 25 Sleeping Bag

The latest addition to our Extremelite Series is a wide sleeping bag made for side sleeping comfort, the Terralite. It features our 12 denier ripstop nylon shell fabric with a 15 denier nylon taffeta lining material. There are two zippers allowing this bag to mate with our mummy bags and the second zipper opens the bag up completely around the foot. With both zippers open this bag can make a fairly wide camper van comforter, but even when zipped up it is extremely comfortable. This is due to its wide girth through the middle of the bag, a design that side sleepers will find ideal. Despite the comfortable shape, this bag weighs less than two pounds.image

Specifications for Western Mountaineering Terralite 25 Sleeping Bag:

Manufacturer: Western Mountaineering
Color: Navy Blue
Temperature Rating: 25
Bag Shape: Mummy
Zipper Type: Left
Lining Material: 15D Nylon Taffeta
Insulation: 850 Fill Goose Down
Insulation Weight: 18
Gender: Unisex
User Height: 5 ft 6 in (Women's Petite or Short);6 ft 0 in (Regular);6 ft 6 in (Long)
Weight: 1.8 lb
Age Group: Adults
Condition: New
Application: Backpacking
Fabric/Material: 12D Nylon Ripstop
Warmth Rating: 25
Last Chance: Yes
Weight Range: 1 - 1.9 lb
Sleeping Bag Size Regular
Weight 1.8 lb

Features of Western Mountaineering Terralite 25 Sleeping Bag

  • Dual Zipper design allows bag to open completely
  • Continuous Baffle Construction
  • 3 dimensional down filled draft tube
  • Insulated Hood with adjustable draw closure
  • 850 + fill power premium goose down
  • 12 denier ripstop nylon outer shell fabric with 15 denier nylon taffeta lining

Package Contents:

  • Western Mountaineering Terralite 25 Sleeping Bag -850 Down-
Customer Reviews for Western Mountaineering Terralite 25 Sleeping Bag Read All (7)
Helpful Positive Review
by Brian, from MI, United States Updated on November 10, 2025
Very nicely built sleeping bag...It has one zipper for the side and one for the feet. It will open up and can be used as a quilt...Not so sure about the zipper at the feet but time will tell...Bag is light weight and compacts down very small. MADE IN THE US was a driving force in my choice..
Helpful Positive Review
by Dwight F., from VA, United States Updated on December 15, 2024
Bought two of these bags to hike the Appalachian Trail with the wife. Really like the way they zip together and they are so puffy, they nearly filled the entire tent. Wife is a cold sleeper and she is toasty warm. I like the extra width because I roll around a lot. I would recommend this bag to others.
Helpful Positive Review
by B.Blevins, from AZ, United States Updated on March 18, 2024
I've used the Terralite as my in-home bed for a week now and it is a dream. Top quality, massive loft, super warm. I'm really looking forward to seeing how much cold it will handle with winter approaching. I'm sure I won't be disappointed.
Helpful Positive Review
by Patrick M., Verified Owner from NC, United States Updated on March 18, 2024
This will be the second western mountaineering bag I own. I also have the summer lite for ultralight lightweight trips. The Terralite is much roomier and very warm. When unzipped like a quilt you can easily fit two under the bag and sleep comfortably. Highly recommend for weight, size, and warmth. I've had this bag in the 20's and no layers and stayed very warm.
Helpful Positive Review
by BB, from CA, United States Updated on March 18, 2024
It is a very nice bag. I am a big guy 6'4" 250# and the large size fits me well. Well made and the zipper works without getting caught. It packs up small and weighs in at 2lbs. It would be nicer if it had a neck collor and elastic in the hood drawstring.
Pros:
  • None
Cons:
  • if anything there could be color choices
Best Used for:
  • Backpacking
Helpful Positive Review
by JGoo, Verified Owner from CO, United States Updated on March 18, 2024
I am completely satisfied with my new Terralite bag. It unzips to make a quilt and it is perfect as a cover on a not-so-cold night. I am so happy to have saved up to treat myself to this high-quality, American-made sleeping bag. The materials and quality of construction are like no other. It packs small and is super lightweight and super warm with 850 down. Do yourself a favor,...
Read more
Questions & Answers for Western Mountaineering Terralite 25 Sleeping Bag
Q It says the rating is 35 degrees. Is it not a 25 degree bag?
A
Expert Answer

Great question! This is a 25 degree bag not a 35 degree bag.

Answered by Jordan, Gear Expert, February 7, 2019
Q How wide a sleeping pad would I need to keep off the tent floor? Would it be 1/2 of the Shoulder girth of 64 inches?
A
Expert Answer

Yes, if you wanted to keep it off the ground you would need a 30 inch pad.

Answered by Joshua B., Gear Expert, August 15, 2018
Q When referring to right and left zipper does this mean right as you are looking at it on the page from your computer or right as if you were laying on your back in this sleeping bag?
A

The zip side refers to when you are laying in the sleeping bag, which side it is on. Most people prefer to reach across instead of having the zip on their dominant hand side.

Answered by CampSaver.com, Verified Owner, February 10, 2017
Q Wondering if this bag can be overstuffed to make it alittle warmer as the dimentions are what I am looking for but like a 15 f bag
A

I don’t believe the bag can be overstuffed but there multiple different liners that could be used which would raise (or, lower, rather) the comfort threshold to 12-15 deg. I am like you in that I really like the dimensions of this bag; I am a side sleeper AND have wide shoulders. But ideally I would have a 0deg bag. I can’t find one even remote... Read More

Answered by LittleMountain, Verified Owner, May 8, 2025

Western Mountaineering Terralite 25 Sleeping Bag Orderable Models

List of Orderable Models

  • Western Mountaineering Terralite Sleeping Bag, 25F/-4C, LZ, Navy Blue, 5ft. 6in., 56TERRALZ , MPN: 56TERRALZ , UPC: 813735020850 , Code: Z68-SI-WTM0042-WTM0042-SHORT-LEFT
  • Western Mountaineering Terralite Sleeping Bag, 25F/-4C, LZ, Navy Blue, 6ft. 0in., 60TERRALZ , MPN: 60TERRALZ , UPC: 813735020874 , Code: Z68-SI-WTM0042-WTM0042-REGULAR-LEFT

Western Mountaineering Terralite 25 Sleeping Bag Unavailable & Discontinued Models

List of Unorderable Models

  • Western Mountaineering Terralite Sleeping Bag, 25F/-4C, RZ, Navy Blue, 5ft. 6in., 56TERRARZ , MPN: 56TERRARZ , UPC: 813735020867 , Code: Z68-SI-WTM0042-WTM0042-SHORT-RIGHT
  • Western Mountaineering Terralite 25 Sleeping Bag, 5ft 6in, Left Zip, Clay/Black, Short, 56TERRACLZ , MPN: 56TERRACLZ , UPC: 813735024650 , Code: Z68-SI-WTM0042-56TERRACLZ
  • Western Mountaineering Terralite 25 Sleeping Bag, 5ft 6in, Right Zip, Clay/Black, Short, Clay/Black, Short, 56TERRACRZ , MPN: 56TERRACRZ , UPC: 813735024667 , Code: Z68-SI-WTM0042-56TERRACRZ
  • Western Mountaineering Terralite Sleeping Bag, 25F/-4C, RZ, Navy Blue, 6ft. 0in., 60TERRARZ , MPN: 60TERRARZ , UPC: 813735020881 , Code: Z68-SI-WTM0042-WTM0042-REGULAR-RIGHT
  • Western Mountaineering Terralite 25 Sleeping Bag, 6ft 0in, Right Zip, Clay/Black, Regular, Clay/Black, Regular, 60TERRACRZ , MPN: 60TERRACRZ , UPC: 813735024681 , Code: Z68-SI-WTM0042-60TERRACRZ
  • Western Mountaineering Terralite 25 Sleeping Bag, 6ft 0in, Left Zip, Clay/Black, Regular, Clay/Black, Regular, 60TERRACLZ , MPN: 60TERRACLZ , UPC: 813735024674 , Code: Z68-SI-WTM0042-60TERRACLZ
  • Western Mountaineering Terralite Sleeping Bag, 25F/-4C, LZ, Navy Blue, 6ft. 6in., 66TERRALZ , MPN: 66TERRALZ , UPC: 813735020898 , Code: Z68-SI-WTM0042-WTM0042-LONG-LEFT
  • Western Mountaineering Terralite Sleeping Bag, 25F/-4C, RZ, Navy Blue, 6ft. 6in., 66TERRARZ , MPN: 66TERRARZ , UPC: 813735020904 , Code: Z68-SI-WTM0042-138303
  • Western Mountaineering Terralite 25 Sleeping Bag, 6ft 6in, Left Zip, Clay/Black, Long, Clay/Black, Long, 66TERRACLZ , MPN: 66TERRACLZ , UPC: 813735024698 , Code: Z68-SI-WTM0042-66TERRACLZ
  • Western Mountaineering Terralite 25 Sleeping Bag, 6ft 6in, Right Zip, Clay/Black, Long, Clay/Black, Long, 66TERRACRZ , MPN: 66TERRACRZ , UPC: 813735024704 , Code: Z68-SI-WTM0042-66TERRACRZ
  • Western Mountaineering Terralite Sleeping Bag, 25F/-4C, LZ, Navy Blue, 7ft. 0in., 70TERRALZ , MPN: 70TERRALZ , UPC: 813735024216 , Code: Z68-SI-WTM0042-70TERRALZ
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