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Big Agnes


Big Agnes Mystic UL 15° 850 DownTek Sleeping Bag

The Mystic UL 15 is one of the most technically designed Big Agnes System bags, using a 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 trip where weight and packed size is important, this is the go-to bag for you.


  • 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
  • Stretch fabric panel beneath hood creates a designated pillow pocket
  • DownTek™ water repellent down repels water while maintaining insulating value
  • Zipper Garage 
  • Mate together left and right zip bags
  • 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
  • Superlight Nylon rip-stop shell fabric with high tear strength and a water repellent finish 
  • Nylon Taffeta lining 
  • Insotect Flow™ construction
  • Tapered vaulted foot box creates wiggle room for your feet with out creating large cold air pockets 
  • 850 fill DownTek™ water repellent down
  • Integrated full pad sleeve
  • Rectangular shaped bag

Bag Weight Small: 1lb 15oz / 879g / Reg: 2lb 2oz / 964g / Long: 2lb 5oz / 1.05kg
Fill Weight Small: 12oz / 340g / Reg: 14oz / 450g / Long: 16oz / 451g
Compressed Bag Size Small: 6in x 6.5in / 15 x 17cm / Reg: 7in x 7.5in / 18 x 19cm / Long: 7in x 7.5in / 18 x 19cm
Stuff Sack Size Small: 8in x 17.5in / 20 x 44 c/ Reg: 8in x 17.5in / 20 x 44 cm / Long: 8in x 17.5in / 20 x 44 cm


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