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Western Mountaineering Alder 25°F Sleeping Bag

Western Mountaineering Alder 25°F Sleeping Bag


Need a different size bag?  Shoot us an email, we will special order it for you:  jackie@triplecrownoutfitters.com

Semi Rec

For those mild nights when counting shooting stars is all you have to do, then the semi-rectangular Alder MF is your bag of choice! Roomy enough for comfort and warm enough so you won’t wake with a chill before dawn. This bag has a 62″ shoulder girth and 46″ at the foot. The Alder MF has a zipper along the side so that it can mate with mummy bags and a zipper around the foot so that it can be opened flat as a comforter or zipped to our Summer Coupler to be a sleep for two. This bag was formerly known as the “Aspen MF”. Nothing about the bag has changed except the name.

  • 5 1/4″ Spacing/Continuous Baffles
  • 5″ Loft, 25° F
  • 62″/ 4 6″ Shoulder /Foot Girth
  • 16 oz. Down Fill
  • Zips to Summer Coupler
  • 1 lb. 15 oz. Total Weight





Microfiber Series

Our Microlite XP Microfiber shell fabric strikes the perfect balance of breathability, water resistance, and durability for outstanding performance throughout a broad range of temperatures and conditions. The high density of filaments in each yarn plus the balanced weave of more than 400 threads make it the most breathable of our sleeping bag shell fabrics while providing excellent water repellency that will be effective for decades. Only slightly heavier than our Extremlite Series fabrics, this 20 denier polyester rip stop microfiber is still very lightweight and will be down proof for decades.

Shape Size (ft/in) Rating Loft (in) Inside Girth
shdr/hip/foot (in)
Fill Wt. Total Wt. Stuff size (in) Sac Size
Semi Rec 6’0″ 25° F 5″ 62″/59″/46″ 16 oz 1 lb 15 oz 7″x13″ XS
6’6″ 25° F 5″ 62″/59″/46″ 18 oz 2 lb 1 oz 7″x13″ XS
Shape Size (cm) Rating Loft (cm) Inside Girth
shdr/hip/foot (cm)
Fill Wt. Total Wt. Stuff size (cm) Sac Size
Semi Rec 180 -4° C 13 157/150/117 455 g 880 g 18×33 XS
200 -4° C 13 157/150/117 510 g 935 g 18×33 XS

Additional information

Length and Zip

6', 6' 6"


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Orders are shipped USPS Priority Mail next business day. We accept returns on unused merchandise. Books must still be shrinkwrapped. If the original order received free shipping and or a promotional Yogi Handbook, and following the return it no longer qualifies. Shipping will be charged at $5.00 and the Yogi's Handbook will be charged at $40.00. Contact us for return instructions 559.850.4453