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  • Western Mountaineering - Alder MF Sleeping Bag: 25 Degree Down - Royal Blue
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  • Western Mountaineering - Alder MF Sleeping Bag: 25 Degree Down - Royal Blue

Western Mountaineering Alder MF Sleeping Bag: 25 Degree Down

$470.00 - $485.00

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    • 6ft/Left Zip
    • 6ft 6in/Left Zip

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    • Royal Blue

    3 Reviews


    Loftiest down, protective shell, and versatile convertibility.

    Lay Western Mountaineering's Alder MF 25 Degree Down Sleeping Bag down in the meadow, and stargaze until you're ready for bed. Perfect from spring until autumn, the Alder's 850+ down insulation has the loftiest fill rating available, resulting in the highest warmth to weight ratio on the market. Unlike most water-resistant shells, Western Mountaineering's Microlite XP fabric offers weather protection that lasts. The MicroLite XP shell helps the down retain its lofty warmth when the meadow gets moist. 

    Continuous baffles let you shift the down towards the top or bottom for more or less warmth. A semi-rectangular shape offers more space and comfort for camping. There's a full-length zipper on either the right or left side, and you can zip it around the foot to convert the bag into a blanket for versatility. The zipper also zips into other compatible sleeping bags so you can cuddle with other campers. Western Mountaineering included a waterproof stuff sack and a storage sack with a large volume that helps the bag retain its loft over time.

    • 25F degree lower limit rating
    • 850+ down insulation
    • Semi-rectangular shape
    • Water-resistant MicroLite XP shell
    • Full-length zipper on left or right side
    • Continuous baffles
    • Stuff and storage sacks included
    • Item #WES000J

    Tech Specs

    MicroLite XP (microfiber), DWR finish
    850+ fill down
    full-length, left/right
    Shoulder Circumference
    62 in
    Hip Circumference
    59 in
    Foot Circumference
    46 in
    Bag Length
    6 ft, 6 ft 6 in
    Fill Weight
    [6ft] 16 oz, [6ft 6in] 18 oz
    25 F
    Storage Sack
    yes, large volume
    Stuff Sack
    yes, urethane coated waterproofing
    Stuff Size
    7 x 13 in
    Claimed Weight
    [6ft] 1 lb 15 oz, [6ft 6in] 2 lb 1 oz
    Recommended Use
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

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    Very versatile 3 season bag

    • Familiarity: I've put it through the wringer

    I use the Alder for 3 season camping and love the many ways you can configure it. There are two zippers, one on the foot and the second up the side. So you can vent the bottom on warm nights, unzip both completely to use it as a quilt, or even use it for two people with the Summer Coupler or by zipping it into a Western Mountaineering Mummy Bag. The 25 degree rating is great for most guys for 3 seasons. When the temps start dipping into the 30's I recommend a warmer bag for women, who generally run colder than men. The Alder does not have a hood or collar either so the top will not wrap around you quite as well as other Western Bags that have those features. It packs down super small, 6L, and is incredibly lightweight. It's my go to summer bag.

    Lots of reason's to Like

      I bought this bag to use for bike touring. With the use of a bivy sack it is the ticket, light, warm and of high quality. The craftsmanship is what drew me to Western Mountaineering products. Dick

      Excellent quality

      • Familiarity: I've used it several times

      The stitching on this bag is amazing. Great quality zippers and other materials were used. I bought this for backpacking but also for use in my truck bed with the summer coupler and two Therm-a-Rest Luxury Map Sleeping Pads. It's a great setup for one or two people.