Gregory Z40 Pack

Priced: $125.99 - $179.00 Rated:   - 5 stars out of 5 by 8 reviews.
Gregory Z40 Pack
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Regularly: $168.95
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Eastern Mountain Sports (EMS) $169.00
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Gregory Z40 Pack -
Gregory Z 40 Pack Features.

Gregory Z 40 Pack.
The Gregory Z 40 Pack is a must have backpack for all those who want to continue their trekking trip overnight. The bag has targeted features to make packing everything you need a snap. The CrossFlo DTS Suspension is the new load support system, which takes the effort off your shoulders. The auto fit harness system perfectly on your body. The backpack has a separate sleeping bag pocket that allows you to store and retrieve without disturbing other items. There are various zippered pockets to keep small but often used items. The backpack has many other pockets at waist belt, on the side to carry easy to reach items. A removable rain cover is provided in a zippered pocket so that none of your stuff gets wet in case of rain. There are dual hydration ports and sleeve. The expendable front bucket pocket can accommodate all your stuff completely. There are two axe/tool attachment points that are very helpful during trekking. The backpack is made of high quality 210D double diamond ripstop and 330D nylon oxford flatweave making the bag highly strong and durable. The Gregory Z 40 Pack is a ventilated pack that is full of features making it irresistible.

Key Features.


  • Unique DTS harness yoke configuration increases the stiffness of the frame as the load in the pack increases


  • Interior zippered mesh pocket
  • Multiple zip through access points and a separate sleeping bag compartment
  • Removable raincover in zippered pocket
  • Sleeping bag compartment with collapsible zippered shelf


  • Expandable front bucket pocket
  • Top pocket with key clip and a second stash compartment on underside
  • Dual side mesh pockets
  • Dual quick access waistbelt pockets


  • Durable material
  • 210D double diamond ripstop and 330D nylon oxford flatweave


  • Auto-Fit harness system


  • Lightweight spring steel bar with new wire frame shape, curves directly into the lumbar pad


  • Harness and waistbelt use moisture-wicking mesh to help keep you dry


  • Dual hydration ports and sleeve


  • Proprietary CrossFlo DTS Suspension provides cooling airflow across the back


  • Side compression
  • Dual axe/tool attachment points

The Gregory Z 40 Pack. Ideal for a quick overnight trip, the Z 40 has targeted features to make packing everything you need a snap. Multiple zip through access points and a separate sleeping bag compartment keep all your gear in its place and allow you to easily retrieve individual items without having to unpack it all.

FEATURES of the Gregory Z40 Pack.

Built for quick overnight and general all-mountain use, this Gregory Z 40 Backpack is up to 30% lighter than previous models. Dynamic yoke integrates the shoulder harness directly to the X-Frame, activating the suspension as the weight increases, automatically balancing flexibility and stiffness of the frame. Proprietary CrossFloâ„¢ suspension promotes cooling airflow across the back without sacrificing load transfer. The trampoline-style back panel automatically increases in stiffness as you add weight to the pack. Sculpted design promotes a streamlined, low-profile housing. Fewer seams increase pack durability and lower overall weight. Breathable back panel, shoulder harness and hip belt promote comfort. Storage options include quick stow attachment for trekking-poles or fishing rods; two exterior stretch water-bottle pockets; hideaway axe/trekking pole loops with secure carry, interior sleeve with port for hydration reservoir (not included), convenient U-shape zippered front access to main compartment, front bucket pocket, dual quick-access hip belt pockets, top pocket with key clip and a second stash compartment on underside. Side and bottom compression secures bulky loads. Integrated, color-matched rain cover. Imported.
Color: Storm.
An ultralight overnight or a quick hike or bike trip bag, the Gregory Z40 carries your gear effortlessly with a unique Jet Stream Dynamic Transfer System suspension system. A Tensioning system adjusts to the weight of the load to give you the perfect amount of support. Along with organization pockets, hydration sleeve and air-flow though the back panel to keep you cool through the summer heat.

Eastern Mountain Sports (EMS)
Ideal for a quick overnight trip, the Gregory Z40 Backpack has targeted features to make packing everything you need a snap.

Country of Origin: Imported

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Average Price History: Price History
Review RatingNumber of Reviews
Adjustable Torso Lengths:m
Compression:Side compression
Custom Fit Options:Auto-Fit harness system
Dimensions:25.5 x 12 x 13 in.
Gear loops:Dual axe/tool attachment points
Hydration Compatible:Yes, Dual hydration ports and sleeve
Material:210D double diamond ripstop and 330D nylon oxford flatweave
Number of Access Points:3 - top, front, bottom
Pack Fabric (Primary):210D double-diamond ripstop
Suspension:New CrossFlo DTS Suspension
Torso:M: 18" - <20" L: 20" - 22"
Torso Length:M 16-18 in.L 18-20 in.
Trip Length:Overnight (1-2 nights)
Volume:2563 cubic inches / 42 liter
Volume Range:30-45 liters
Weight:M 3 lb. 4 oz.L 3 lb. 7 oz.
Weight Capacity:Up to 30 lb.
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Gregory Z40 Pack Reviews:

Positive Reviews:

Great pack!

This is my first technical hiking pack, and so far it has been excellent. It came highly recommended by an employee while I was browsing the selection at the West Lebabon, NH store. He took the time to cover all of the features and make sure it fit me properly. Since he is a proud owner of this pack, we even discussed some of the ways that he packs certain items, and just how versatile this pack can be. The pack was then loaded it with some weight and I was instructed to walk around the store for a bit to see how it feels. Needless to say, it felt great and I brought the pack home with me that day. Great shopping experience!

So far I have only used the pack for day hikes. But I do intend on using it for some 2-3 day outings, and I'm confident that this pack is well suited to carry everything I will need. I've been told that one could live out of this pack for many more days, but I think that perspective will require a lot more use and experience.

I really like the suspension system that allows airflow across your back. It's not air conditioning, but it's better than nothing. It's hydration pack compatible, and the Camelbak 100oz Antidote reservoir (sold separately) works perfectly. I also like that there are three ways to access the main compartment; top, middle and bottom. This allows many options when it comes to how you pack items. The final item that prompted me to buy this pack is the fact that it comes with a rain cover that has it's own zippered pocket.

Overall, this pack is great. I highly recommend it if you're looking for a pack this size. I also highly recommend shopping in store to ensure you get the proper fit. Thanks EMS!
Mark at Eastern Mountain Sports (EMS) on 11/11/2013

the sweet spot for dayhiking

I use this pack for day hikes. For years I used the Gregory Z22 and liked it, but I increasingly added more "survival" gear (bigger medical kit, gaiters, rope etc.) so the Z22 seemed a little cramped. Adding another 1000 cc's with the Z40 added very little weight and really improved the loading. It also seems to have a better suspension or for whatever reason feels more comfortable. My routine load is about 20 lbs.,and the pack could easily accomodate another 10 or so,although I have not yet used it for an overnighter. So I think it's the perfect size for someone like me who dayhikes 30 or so miles a week and occasionally camps out overnight. Great features too-- multiple access points, sleeping bag compartment and especially the two elasticized side pockets (water bottles and bear spray). Finally, EMS put it on sale, so the deal was good also. Very happy with it.
orca at Eastern Mountain Sports (EMS) on 11/11/2012

Simply Outstanding...

I purchased this pack sight unseen, but after a lot of research. Not disappointed. The pack is well made with zippers that actually work. The hip belt straps are a nice size and don't fold over and jam like some others. I like that it has a separate bag compartment, although it's obviously sized for ultralights (not surprising given the intended uses of the pack). Also includes a pack cover built into a little pocket underneath...very handy feature. We'll see how it performs after a few months of hard use, but I'm hopeful.
Kurt at Eastern Mountain Sports (EMS) on 07/07/2011

Totally Exceeded My Expectations

I did research for over a month deciding on the best manufacturer and then the best model. The Gregory Z40 was the choice. Today, I took the Z40 out on the trail, and I must say it has exceeded my expectations. Once I put the pack on and tightened the straps, the pack felt like it was custom made for my back. We climbed a 4200 mountain and not once did I feel any discomfort on my shoulders or back. The suspension is top notch.
MarkintheHV at Eastern Mountain Sports (EMS) on 10/10/2013

Perfect mid-size bag

I ordered this bag for a week-long trip to Barcelona. It's sized just right for carry-on luggage, and I managed to pack just enough to get me through 1 week at a hostel in BCN. If you need to pack a bunch of different outfits for the club this isn't for you, but if you're packing light and seeing the sights like I did it's just fine.
Greg at Eastern Mountain Sports (EMS) on 02/02/2012

Comfortable and functional!

I bought this backpack to take with me from the U.S. for hiking in the U.K. and it has been really wonderful. It is a good carry-on for flying and lovely for biking, walking and hiking around. The adjustable straps allow you to fir the pack to your body really comfortably!
Emerson at Eastern Mountain Sports (EMS) on 08/08/2012

Excellent Pack

This is a very versatile pack. On my hikes I need to carry lots of water and it's very comfortable to carry all that weight with this pack. Gregory packs are designed for comfort along with excellent ventilation on your back.
Kurt at Rock/Creek Outfitters on 08/08/2011

Negative Reviews:

many decent points but with a fatal flaw

Decent in general, while hiking standing up, but as soon as you bend forward to look at a cool plant or to tie your shoes, watch out! Yikes! Really uncomfortable metal pressing against back. The way the stays are arranged seems nice as far as engineering, but gosh, not on your back! They had it better with the previous year's version, that had a somewhat different arrangement, and was comfy, too bad I don't still have that one.
Disappointed at Eastern Mountain Sports (EMS) on 06/06/2013