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  • CrossFlo DTS suspension provides cooling airflow across your back and effectively transfers load weight to your hips
  • Auto-Fit harness increases the stiffness of the frame as the load in the pack increases, helping ensure that the pack maintains its shape
  • Lightweight spring steel bar held in tension transfers load weight directly to the hipbelt and lumbar pad
  • 3 points of access make it easy to load and unload your gear, food and sleeping bag
  • Hydration-compatible design features reservoir pocket and dual drink-tube exit ports for on-the-go hydration (reservoir sold separately)
  • Easily accessible zippered front pocket lets you stash bulky gear
  • Top lid features a zippered pocket for stashing small items and a second compartment on the underside for securing personal items
  • Side compression straps let you cinch down loads for jostle-free carrying
  • Hipbelt pockets are ideal for stashing snacks, energy gels, lip balm, sunscreen or a mini-tool
  • Mesh side pockets provide a handy place for frequently accessed items such as water bottles, GPS, maps and snacks
  • Dual axe/tool loop attachment points let you strap on gear outside
  • Removable raincover stows in its own zippered pocket
  • Gregory Z40 pack is constructed from 210-denier HT double diamond ripstop and 330-denier nylon oxford flatweave fabric for tear strength and abrasion resistance


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Best Use Backpacking
Frame Type Internal Frame
Gear Capacity (L) 40 / 42 liter
Gear Capacity (cu. in.) 2,441 / 2,563 cubic inches
Weight 3 lbs. 4 oz. / 3 lbs. 7 oz.
Weight - Metric 1.5 / 1.55 kilograms
Fits Torso 18 - 20 / 20 - 22 inches
Fits Waist/Hips 28 - 34 / 34+ inches
Material(s) Double-diamond ripstop nylon/flat weave oxford nylon
Frame Material Tensioned spring steel
Number of Stays 1 peripheral rod
Suspended Mesh Back Panel Yes
Pack Access Top/front/bottom
Number of Exterior Pockets 6 + main compartment
Sleeping Bag Compartment Yes
Raincover Included Yes
Gender Men's
Backpack Style Lightweight backpack