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Big Agnes Fly Creek Ultralight 25 Degree Sleeping Bag, Regular
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Big Agnes Fly Creek Ultralight 25 Degree Sleeping Bag, Regular

SKU: BIGFCUDR MFR: BFCULR2525
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$499.95
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Key Features

  • Experience superior warmth with 850 fill DownTek PFC-Free insulation, even in damp conditions.
  • Enjoy ultralight adventures with this 1 lb 10 oz sleeping bag, perfect for backpacking trips.
  • Stay comfortable down to 25 degrees F, ensuring a restful night's sleep in cool weather.
  • Benefit from eco-friendly design featuring recycled NetPlus 10D nylon ripstop shell fabric.
  • The spacious 60" shoulder girth provides ample room for a comfortable and unrestricted sleep.
  • Easily pack and carry this sleeping bag, compressing to a convenient 8 x 9.5" for travel.
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Reviews about this item

Review Summary

2025-08-19T20:00:00

Rated 5 out of 5

I recommend this product

Great summer bag Colorado's hi country ! great weight to warmth ratio .

Daren

2025-08-11T20:00:00

Rated 5 out of 5

Perfect bag for 30 degree nights

I used this sleeping bag for a 3 day adventure in the Eastern Sierra, mid summer but with much cooler evenings. I wore only my boxers while sleeping in it overnight and it was PERFECT. Not too hot or too cold, nights were hovering around 30-35F and this bag performed. It also passed the husky durability test. Our husky slept on it (on me) for part of the night and walked all around, no punctures or anything. I also really love and appreciate how far down the zipper goes for when I have to water the plants in the middle of the night. It packs down super small and is barely noticeable in my pack. This is my new go-to sleeping bag for all summer adventures.

Paz

2025-07-13T20:00:00

Rated 4 out of 5

Light and compact, but with a few issues

I love how compact and light the Fly Creek bag is. Unfortunately, I don't feel that it held up to it's temperature rating. I was fairly uncomfortable in this sleeping bag at just under 40 degrees. The center zip is nice for sleeping on your side without the zipper poking you, however it is too short to get in/out of the sleeping bag without shimmying up and down in and out. Another 9" would have made it so you could unzip past your knees and exit. When the zipper is pulled up all the way, the zipper pull tickles you in the face and makes you question whether a bug is biting your face. For the money, I think there are better options.

Cliff

2025-03-26T20:00:00

Rated 5 out of 5

Most favorited piece of my gear!

Big Agnes truly nailed it with this ultralight design. Weighing in at just 1.10 lbs, it keeps you warm even on those freezing nights, with a very extreme rating of down to 19°F. What's even better is how compact it packs down-about the size of a family-sized tub of cheeseballs (or, honestly, it might even fit in an empty tub!). It's especially great for me since I tend to overpack. Definitely worth the investment. I'm thrilled with it, and I love that it's made from recycled fabric with a silky smooth feel.

Jason

Big Agnes Fly Creek Ultralight 25 Degree Sleeping Bag, Regular Specifications

  • Shell/Lining

    Ultralight recycled NetPlus 10D nylon ripstop with a water-repellent finish without intentionally added PFAS. Fabric made from recycled fishing nets

  • Insulation

    850 fill Downtek PFC-Free maintains insulating value even while wet, using bluesign approved water-repellent chemistry without intentionally added PFAS

  • Fill Type

    850 Downtek PFC-Free

  • Upper Bag

    Big Agnes Signature Diamond quilt-through construction

  • ISO Comfort

    35 Degree F

  • ISO Limit

    25 Degree F

  • Girth

    Shoulder Girth: 60" (152.4cm)
    Hip Girth: 54" (137.2cm)
    Foot Girth: 36" (91.4cm)

  • Storage

    Keep your bag hanging if possible, or in its included mesh storage sack
    Store in a cool, dry place away from heat sources
    Bottom and Sides Baffled construction

  • Cleaning

    Even dirtbags wash their bags!
    Machine wash in a washing machine WITHOUT AN AGITATOR, agitators are likely to cause damage to your gear
    Oversized bags require oversized machines, you may need to go to a laundromat to wash your larger bags
    Wash on a warm, gentle cycle
    Use gear specific soap, Nikwax Down Wash Direct is recommended
    Rinse twice

  • Cleaning (Contd.)

    Tumble dry low heat with clean tennis balls
    Finish by drying on high heat in 5 minute intervals to loft down
    *Allow to cool between intervals to avoid damage to shell*
    Do not use fabric softeners
    Do not bleach
    Do not iron
    Do not dry clean

  • Compressed Bag Size

    8 x 9.5" (20.3 x 24.1cm)

  • Stuff Sack Size

    7.5 x 15" (19 x 38cm)

  • Max User Height

    6' (1.8m)

  • Weight

    1 lbs 10 oz (737g)
    Fill Weight 17 oz (482g)

  • UPC Code

    841487150150

About Big Agnes Fly Creek Ultralight 25 Degree Sleeping Bag, Regular

FEATURED REVIEWS

I recommend this product

By Daren

Great summer bag Colorado's hi country ! great weight to warmth ratio .

Perfect bag for 30 degree nights

By Paz

I used this sleeping bag for a 3 day adventure in the Eastern Sierra, mid summer but with much cooler evenings. I wore only my boxers while sleeping in it overnight and it was PERFECT. Not too hot or too cold, nights were hovering around 30-35F and this bag performed. It also passed the husky durability test. Our husky slept on it (on me) for part of the night and walked all around, no punctures or anything. I also really love and appreciate how far down the zipper goes for when I have to...

View full Review

Premium Ultralight Sleeping Bag for Minimalist Backpacking
Designed for fast and light adventures, the Big Agnes Fly Creek ultralight sleeping bag delivers serious warmth in a refined, packable design. This ultralight sleeping bag is built for backpackers who value efficiency, making it an excellent backpacking sleeping bag for thru hikes, fastpacking, and three season camping.

Advanced Materials for Lightweight Performance
This 25 degree sleeping bag uses ultralight NetPlus nylon ripstop made from recycled fishing nets, reducing weight while improving durability. Paired with 850 fill down sleeping bag insulation treated with Downtek water repellent technology, it maintains warmth even in damp conditions, making it a reliable 3 season sleeping bag.

Thermal Efficiency Without Extra Bulk
Big Agnes Signature Diamond Quilting limits down migration while reducing stitch lines to preserve loft and warmth. The mummy profile and ergonomic footbox allow faster heat retention, making this lightweight sleeping bag ideal for cold nights when every ounce matters.

Minimalist Design Built for Real Use
A streamlined hood with a low profile cordlock keeps warmth in without limiting airflow. The half length center zipper allows easy temperature control while reducing weight. An insulated zipper and draft collar further improve thermal performance, creating a highly efficient Big Agnes Fly Creek sleep system.

Packable Comfort for Every Overnight Trip
This Big Agnes sleeping bag includes both a mesh storage sack for long term care and a compact stuff sack for trail use. For maximum compression, it pairs easily with a compression sack, making it a smart choice for hikers building a compact gear kit.

Big Agnes Fly Creek Ultralight 25 Degree Sleeping Bag, Regular Features

  • Ultralight mummy design reduces pack weight without sacrificing warmth
  • 25 degree rating supports three season backpacking conditions
  • 850 fill Downtek insulation maintains loft even in damp weather
  • Diamond quilting improves warmth while reducing overall stitching
  • NetPlus recycled shell fabric delivers durability with lower impact
  • Ergonomic footbox increases comfort and thermal efficiency
  • Insulated draft collar helps seal in heat on colder nights
  • Half length zipper allows ventilation with minimal added weight
  • Streamlined hood design retains warmth without restricting airflow
  • Includes storage sack and stuff sack for travel and storage

Warranty Information

This product has a limited lifetime warranty.

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More About SunnySports

Key Features

  • Experience superior warmth with 850 fill DownTek PFC-Free insulation, even in damp conditions.
  • Enjoy ultralight adventures with this 1 lb 10 oz sleeping bag, perfect for backpacking trips.
  • Stay comfortable down to 25 degrees F, ensuring a restful night's sleep in cool weather.
  • Benefit from eco-friendly design featuring recycled NetPlus 10D nylon ripstop shell fabric.
  • The spacious 60" shoulder girth provides ample room for a comfortable and unrestricted sleep.
  • Easily pack and carry this sleeping bag, compressing to a convenient 8 x 9.5" for travel.

What's in the box:

  • Fly Creek Ultralight 25 Degree Sleeping Bag (Regular)
  • Storage Sack
  • Stuff Sack