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Boreas Buttermilks 40 Women's Internal Frame Backpack



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Availability: In Stock!

Ships Monday.

Availability: In Stock!

Ships Monday.
Item # BOR13204M
An ultra-lightweight backpacking or day hiking option, the award-winning Buttermilks 40 Women's pack offers streamlined functionality. The top-loading pack weighs less than 3 pounds and can be reduced less than 2 pounds by removing the framesheet.



An ultra-lightweight option for thru-hikers or fast-and-light backpackers, the award-winning Buttermilks 40 Women’s pack reflects a commitment to simplicity and functionality. The top-loading pack weighs less than 3 pounds and can be reduced to just 1 pound, 15 ounces by removing the framesheet.

A well-cushioned z-foam backpanel and die-cut PE framesheet work in tandem to provide lightweight and ventilated support and stability. When you prefer to travel light, the framesheet can be easily removed with a quick pull on its integrated easy-access handle. Contoured padding in the shoulder straps and hipbelt offers additional comfort and aids in both fit and load control. A sliding sternum strap and load-lifter straps further enable you to fine-tune fit. To ensure that you experience a proper fit, the Buttermilks 40 Women’s pack is available in Medium (fits torso lengths from 16"-18" in length) and Large (18"-20") torso sizes.

The main, top-loading, 2563 cubic inch-capacity compartment employs a lidless roll-top/cinch-down closure to keep contents secure. A large front stretch-fabric pocket serves as a "stuff it" storage option and keeps extra layers in easy reach. Stretch-fabric side pockets are ideal for water bottles and other gear. Large, zippered hipbelt pockets keep essentials close at hand.

Other features include tuck-away daisy chain attachment points, hidden gear loops on the shoulder straps and an included rain cover. A lined internal sleeve makes the Buttermilks 40 Women’s pack hydration system (sold separately) compatible.

The Boreas Buttermilks 40 Women’s internal frame backpack is available in your choice of size options.

  • EVA z-foam backpanel
  • Removable PE frame sheet with easy-access handle
  • Full-face front stretch fabric pocket
  • Two stretch-fabric side pockets
  • Two hip belt pockets
  • Dual daisy chains
  • Hydration compatible
  • Hidden gear loops on shoulder straps
  • Rain cover included
  • 140D ripstop nylon body
  • 420D nylon bottom



Best Use Backpacking, Hiking, Climbing
Access Top Loading
Warranty Lifetime
Volume 2441 cu in
Type Internal Frame Backpack
Sternum Strap Yes; Adjustable Position
Other Rain Cover Included
Material Body: 140D Ripstop Nylon; Bottom: 420D Nylon
Item Weight 2 lb 14 oz
Hydration Compatible Yes
Fits Torso S/M: 18"-20"; M/L: >20"
Fits Waist S/M: <33"; M/L: >33"


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