Gregory Z 40 Pack

1 review
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4-star:   1
3-star:   0
2-star:   0
1-star:   0



This is an excellent pack for three-season use a daypack…

Rating: rated 4.5 of 5 stars
Source: bought it new
Price Paid: $180


This is an excellent pack for three-season use a daypack or as a 1-2 night, minimalist pack. Lightweight. Very good weight distribution. Even when the pack felt heavy lifting it, once it was on it felt like I wasn't carrying anything at all.


  • Lightweight
  • Access from top and front
  • Hydration compatible
  • Integrated rain cover
  • Multiple pockets
  • Comfortable suspension


  • Limited attachment points
  • Mesh water-bottle pockets difficult to use

I was looking for a pack to replace my old Jansport Odyssey 39 liter pack that I had been using. This was OK, but the capacity was limited by several different pockets and was better suited as a school/book bag.

The Z40 was just what the doctor ordered. It has plenty of space for an extended day hike (extra clothes, food, stove, 10 Essentials, and even a tarp as emergency shelter) or even a fair weather overnight. New with the 2014 revision is there is no longer bottom access or sleeping bag compartment. Instead, the front access zipper opens from the bottom and flips up over the top of the bag. This allows for very easy access to the entire main compartment, especially the bottom. The top is easily accessed through top opening.

The suspension is top notch. When loaded with about 35 lbs of gear, the pack felt heavy lifting it but as soon as I put it on I was AMAZED at how light it felt. The trampoline suspension does an excellent job of distributing the weight. I also noticed there was absolutely no sway while hiking or scrambling over blow-down.

Downside is the lack of attachment points. There are two trekking pole/ice ax attachments, but I am not sure I would use them for the latter. This reduces its functionality for winter use as there is also no way to attach snowshoes or skis. However, for three-season use it is now my go-to bag for day hikes.

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Retailers' Descriptions

Here's what other sites are saying:

Free Shipping. Gregory Z 40 Pack FEATURES of the Gregory Z 40 Pack Updated CrossFlo Suspension Ventilated backpanel Wrap-over padding on waistbelt for added comfort Integrated, color-matched rain cover Every model sheds weight for 2014 Two exterior stretch waterbottle pockets Hideaway axe/trekking pole loops with secure carry Interior sleeve with port for hydration reservoir Front bucket pocket Dual quick-access waist belt pockets Side and bottom compression 210D robic dynagin, 100D robic GR shadowbox, 200D polyester oxford, 256g polyester stretch woven and 190T nylon taffeta materials U-shape zippered front access to main compartment Front zippered pocket Quick draw closure on main access Top pocket with key clip and a second stash compartment on underside SPECIFICATIONS for Small Weight: 2 lbs 11 oz / 1.22 kg Volume: 2319 cubic inches / 38 liter SPECIFICATIONS for Medium Weight: 2 lbs 14 oz / 1.3 kg Volume: 2440 cubic inches / 40 liter SPECIFICATIONS for Large Weight: 3 lbs 1 oz / 1.39 kg Volume: 2563 cubic inches / 42 liter

- Moosejaw

Gregory's Z 40 backpack for men fills that niche between a daypack and a weekender making it perfect for one-day ridge epics, winter summit assaults, or warm-weather overnights. Side and bottom compression keeps smaller loads locked down for shorter outings, expanding when needed to gulp down rainwear or bulky layers in variable, wet, or cold weather.

- Mountain Gear

If you can't decide whether you will be out for a day or the weekend try the Z 40 from Gregory Mountain Products as it falls right between the two. Providing you with more than enough pockets for both organized and convenient storage as well as EVA foam on both the hip belt and harness to ensure that you will be feeling comfy as you go about your day. The only downside that comes with the Z 40 is that it may keep you out in the wilderness longer than you had originally expected. PRODUCT FEATURES: Specs: Small: Volume: 38 L Weight: 2 lbs 11 oz / 1.22 kg Torso: 16 in - 18 in Medium: Volume: 40 L Weight: 2 lbs 14 oz / 1.30 kg Torso: 18 in - 20 in Large: Volume: 42 L Weight: 3 lbs 1 oz / 1.39 kg Torso: 20 in - 22 in Updated CrossFlo Suspension Ventilated EVA foam on hip belt and shoulder harnesses Top-loading main compartment with quick-draw top closure and full-body front U-zipper access Floating, removable top pocket with zippered pocket and key clip Under-lid zippered stash pocket Front zippered pocket Front bucket pocket for quick gear storage Two external stretch water bottle pockets Dual quick-access waist belt pockets Interior hydration sleeve with hose port Hideaway ice axe/trekking pole loops Side and bottom compression straps Quick-attach, integrated color-matched rain cover Materials 210D robic dynagin, 100D robic GR shadowbox, 200D polyester oxford, 265g polyester stretch woven and 190T nylon taffeta

- Appalachian Outdoors