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About Gregory Z55 Backpack - Internal Frame

Closeouts. With the Gregory Z55 backpack's advanced Jet Stream suspension system, you can tweak the load distribution to your individual preference, making long hikes and climbs much more comfortable.


Specs about Gregory Z55 Backpack - Internal Frame

  • Pack material: 210 denier double diamond ripstop nylon and 210 x420 denier HD flat weave fabrics
  • Frame type: Internal
  • Frame material: HDPE framesheet and aluminum stays
  • Hydration compatible: Yes
  • Pack loading: Top with side zipper access
  • Recommended use: Backpacking Multiday
  • S:
  • Dimensions: 25x12x10"
  • Pack capacity: 3050
  • Weight: 3 lb. 2 oz.
  • Fits torsos: 16-18"
  • M:
  • Dimensions: 28x12x10"
  • Pack capacity: 3350
  • Weight: 3 lb. 5 oz.
  • Fits torsos: 18-20"
  • Fits torsos: S 16-17-½" M 18-19-½" L 20-22""
  • L:
  • Dimensions: 30-1/2x12x10"
  • Pack capacity: 3660
  • Weight: 3 lb. 8 oz.
  • Fits torsos: 20-22"
  • Made in China or Philippines
  • Visit our Backpack Guide
  • Cannot ship to China
  • Cannot ship to Japan.
  • Cannot ship to South Korea.


Do you own this product? Write a review and help others with their buying decisions!

4.566666 5 Overall Rating: 4.6 Based on 30 reviews

Most Helpful 5-Star Review

Verified Buyer Reviewed by Feezy from Kailua, HI on Monday, May 17, 2010
This pack is perfect for a lightweight backpacker from anywhere from a weekend to a couple week trip. The side access to the main compartment is awesome. Suspension system couldn't be more comfortable and keeps my back cool!
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  • Reviewed by Solnick hiker from New orleans on Saturday, July 25, 2015
    First off I want to say this bag is very lightweight and stretches to fit whatever you need , within reason. The back ventilation is great if you don't have to pack a bear canister or something super bulky. I found when I had my bag fully loaded with the beat canister and all my clothes, gear and full 2l camelback the vent support system didn't do much. It ended up pressing the mesh and the rest of the bag right against my back, leaving no room for airflow. The padding, if you can call it that, on the lower back is useless. I ended up having two huge sores getting rubbed on my back making it bleed. It made the hike extra painful. Also it pressed right into my sciatica making it swell and making the hike almost unbearable. Now that I'm done with the JMT I have some serious back problems. Same goes for the shoulder straps. I'm aware that with any bag there's going to be some sore spots on the hips lower back and shoulders but everyone I saw who had this bag on the JMT complained about how bad it rubs up against the skin. I never thought I'd have to put mole skin on my back. You can't really fit much in the waist strap pockets maybe some extra change and a cliff bar. It's almost impossible to get your water bottle out of the side pockets without taking the bag off. Lastly I'm glad there's a warranty because the seems on that hold the adjustable star on the top of the shoulder straps tore and kind of deformed the whole shoulder strap making it dig into my collarbone even more. I love the sleekness and ability to fit a lot of stuff in this bag. The rain cover is also great. I just wish where they cut wieght wasn't in the padding.
  • Verified Buyer Reviewed by xiaoyao from BEAVERTON on Saturday, May 9, 2015
    I recieved my backpack recently,I'm very satisfied with it. It's great, but I think it will be more useful if it could provided more instruction about the backpack.,thus I could learn more about how to use it.
  • Reviewed by Ben Rickman from North Carolina on Thursday, October 9, 2014
    I've taken this a couple hundred miles on the A.T. and in coastal/beach environments. It's a beast. Super durable and a great back. I really like the pockets on the waistband, and the accessibility pouches on top and side. I wish it was less weight, but it's a trade off in price and durability I think.
  • Verified Buyer Reviewed by victor from zhe jiang china on Tuesday, June 10, 2014
    pretty good,and cheap.
  • Verified Buyer Reviewed by DCer from D.C. area on Thursday, April 17, 2014
    I am writing a review after using this backpack in a week-long trip. First and foremost, I was looking for a backpack - big enough - to carry on a plane overhead compartment. Having read limited reviews on the ability of this pack to do that, I was pleasantly surprised to accomplish that. Big plus there!

    Everything else about this pack is top notch - the ripstop nylon seems very sturdy, as well as the zippers and re-enforcement clips. The only reason why I did not give it 5 starts is its lack of a pocket on the underside of the top compartment. That pocket could be relevant to deter water, or to store documents in a more secure manner. Most other packs that I compared it against (in stores or while looking online) have a pocket there, including the same-year Z35 that I saw in a store. Other than that, I am very satisfied with this pack so far.

Question & Answer

Questions about this product? Get answers from community and staff experts.

  • “What is the smallest size of waist will the large go to?”
    Asked by Ryan from Idaho on 7/28/2014 10:43:26 AM
    • The large can go down to 35"
      Answered on 8/5/2014 5:36:43 PM by Product Specialist Greg from Company Headquarters
  • “Does this model have a loop or clasp to hold the top of the water bladder or does the bladder sit loose in the sleeve/compartment?”
    Asked by Matt B. from Texas on 12/30/2013 1:30:34 PM
  • “IS this 2013 model?”
    Asked by rockfive from newyork on 12/10/2013 8:38:53 AM
    • This is not the 2013 model.
      Answered on 12/10/2013 1:43:10 PM by Product Specialist Greg from Sierra Trading Post
  • “What is the correct way to measure your torso (in order to order the correct pack)?”
    Asked by D(cube)N from Hillsborough NC on 11/24/2012 12:00:00 AM
    • Here is link to our Backpack buying which will explain how to measure your torso.| or you can click on Visit our Backpacks Guide at the bottom of the Overview tab on the description.
      Answered on 11/30/2012 12:00:00 AM by Prod Spec Kevin from Sierra Trading Post
  • “how long would it take to ship to florida gainesville? and would it be a carry-on bag to flight?”
    Asked by jihao from gainesville,fl on 11/5/2012 12:00:00 AM
    • We ship UPS ground and it would arrive in 4 to 6 business days.|General Carry on luggage size dimensions are 22”x14”x9” for a total of 45” linear (all together) and weighs 40 lbs. However it is best to check with the airline that you are using. These standards can vary from air carrier to air carrier.
      Answered on 11/6/2012 12:00:00 AM by Prod Spec Kevin from Sierra Trading Post

About Gregory

After designing his first backpack as a Boy Scout at the age of 14, Wayne Gregory dedicated his career to making outstanding gear, a mission that eventually led him to create Gregory Mountain Products in 1977. From the beginning, Gregory backpacks have been engineered using a combination of field research and customer feedback in order to enhance durability, fit and function. The brand has pioneered many industry firsts, such as multiple pack sizes with different frame, harness and waist belt dimensions. They also developed the first waist belt system that offered a variety of hip angles. Not surprisingly, Gregory backpacks have been praised in a wide range of publications, from Backpacker magazine to National Geographic Adventure.