Why We Like It

The Mystic UL 15 is one of the most technically designed Big Agnes System bags, using their Flex Pad Sleeve design, a very durable nylon ripstop 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.


  • Nylon ripstop shell fabric with a water repellent finish 
  • Nylon taffeta lining 
  • Insotect Flow™ construction
  • 850 fill DownTek™ - a water repellent down that uses a PFC-Free, bluesign™ approved chemistry.