Big Agnes Blackburn UL 0 Down Sleeping Bag

-18°C Comfort Limit, 666g of 850 Fill Power DownTek (US Method)
Weighs 1250g (Regular bag)
Code: DSSS18543V
  • £589.99
  • (FREE UK & EU Delivery)
+ In Stock Now | Usually dispatched within 24 hours

The Blackburn UL 0 is part of the classic down series of Big Agnes sleeping bags that offer warmth, compressibility and the Big Agnes System bag design which integrates the sleeping bag and sleeping mat.

Big Agnes says: Down fill Big Agnes System bags designed to excel in all conditions and provide more room than a mummy bag.

The Blackburn UL 0 is one of our most technically designed Big Agnes System bags, using our full pad sleeve design, a very durable nylon rip-stop shell fabric, and super cozy 850 fill power DownTek™ water repellent insulation. This bag combines ultralight versatility with a long line of packable creature comforts. Whether you're a 3/4 length-pad-carrying, fast fly tent-gram-counter or just gearing up for a cold weather hut trip where weight and packed size in important, this is the go-to bag for you.

Big Agnes's Blackburn UL 0 Down Sleeping Bag is still light enough to take backpacking but is more focused on comfort than just the weight. The stretch fabric designed to contain the sleeping mat improves the connection between bag and mat making for a great nights sleep.

The Downtec hydrophobic treated 850 fill power down repels water and speeds up drying time it if does get wet. The lightweight nylon ripstop fabrics are durable and soft to the touch. Vertical side walls help to trap heat closer to your body and the contoured hood will cradle your head for a more comfortable fit.

The bag is well proportioned and quite spacious internally. This would suite people who want that extra space or those who move around a lot as this has the added benefit of the Free Range hood. The bag is designed using Insotect Flow technology which uses vertical baffles to transfer heat from the core of your body to your extremities so it will help keep your feet warm.

To use the full pad sleeve a rectangular sleeping mat is needed and the dimensions of the bag need to match. The material does stretch enough to fit a pillow in too to maximise that comfort. 

- Reviewed by Ultralight Outdoor Gear

Please note: This item is stored offsite and is not available for next day delivery.

Help and advice:Choosing a sleeping bag adviceEN 13537 rating for sleeping bags explainedAll about down filling in sleeping bags
Sleeping bag shape and sizes adviceSleeping Bag features Page 1Sleepin bag features page 2
  • Design improves connection between pad sleeve and bag providing a roomier sleeping space without adding bulk
  • Sculpted contour allows the bag to drape around you, increasing insulation performance
  • Free Range Hood design gives you the freedom to lift your head while snuggled in the hood
  • Low profile cordlock lets you un-cinch the hood with one hand
  • Tapered vaulted foot box creates wiggle room for your feet with out creating large cold air pockets
  • Stretch fabric panel beneath hood creates a designated pillow pocket
  • DownTek™ water repellent down repels water while maintaining insulating value
  • Integrated full pad sleeve
  • Rectangular shaped bag
  • Superlight shell fabric with high tear strength
  • 70" / 178cm YKK #5
  • Zipper Garage
  • Mate together left and right zip bags within a series
  • No-draft collar, No-draft wedge, No-draft zipper
  • Interior fabric loops for sleeping bag liners
  • Exterior loops for hang drying or storage
  • Mesh storage sack & nylon stuff sack

The Blackburn 0 can be coupled with a Blackburn 0 bag with a zipper on the right hand side. Contact us if you are interested in ordering a bag that will couple with the Blackburn 0 Sleeping Bag.

Big Agnes SpecsRegularLong
Weight2lb 12oz / 1.25kg / 12503lb / 1.36kg / 1360g
Fill850 DownTek850 DownTek
Fill weight666g / 23.5oz723g / 25.5oz
Stuff sack size23 x 51cm23 x 51cm
Compressed bag size18 x 20cm20 x 23cm
Shoulder Girth
Hip Girth
Foot Girth
Comfort Limit
Pad Size Needed
Rectangular - 51 x 183cmRectangular - 51 x 198cm

Materials & Construction

  • Nylon rip-stop shell fabric with a water repellent finish
  • Nylon Taffeta lining
  • Insotect Flow™ construction
  • 850 fill DownTek™ water repellent down
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