Cross Mountain 45

Cross Mountain 45

from Big Agnes

  • $149.95

Our Classic Synthetic bags offer great value and high quality materials including Insotect Hotstream® insulation, featuring 100% recycled material, which feels as warm and soft as down insulation. Whether you're looking for your first bag or want to add a synthetic option to your gear quiver, campers of all levels will appreciate the versatility of these Big Agnes System bags. Made thermally efficient with A-Shingo™, A-Flex™, or quilted construction, you'll notice the total body insulation right away. Slip any rectangular 20" wide pad into our full pad sleeve design and you are ready to go.


  • 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
  • Vaulted foot box creates more wiggle room for your feet
  • Rectangular shaped bag
  • Integrated full pad sleeve
  • Stretch panel on pad sleeve doubles as pillow stabilizer
  • Our softest, technical sleeping bag fabrics yet - smooth and soft to the touch
  • 70"/178cm YKK #8 zipper
  • 61"/155cm YKK #8 zipper
  • Zipper Garage
  • Mate together left and right zip bags
  • Interior fabric loops for sleeping bag liners
  • Exterior loops for hang drying or storage
  • Mesh storage sack & nylon stuff sack

Construction + Materials

  • Nylon rip-stop shell fabric with a water repellent finish
  • Nylon taffeta lining
  • Quilted construction
  • Hotstream® by Insotect - 100% recycled polyester insulation

Specs + Sizing

  • Stuff Sack Size (Regular): S 7.5in x 15in / S 19 x 38cm
  • Shoulder Girth (Regular): 70in / 178cm
  • Hip Girth (Regular): 65in / 165cm
  • Foot Girth (Regular): 53in / 135cm
  • Fill Weight (Regular): 11oz / 312g
  • Compressed Bag Size (Regular): 7.5in x 6in / 19 x 15cm
  • Bag Weight (Regular): 1lb 10oz / 737g

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