Storage-wise, the z55--which comes in small, medium, and large sizes--includes a large main compartment, an expandable front bucket pocket, quick-access waist-belt pockets, and dual axe/tool attachment points. The z55 is even hydration compatible, with a hydration sleeve and dual ports. Other features include an Auto-Fit harness system, side and bottom compression, welded water-resistant zippers, and a tough exterior made of 210D HT double-box ripstop and broken twill nylon fabrics. All Gregory packs carry a lifetime warranty.
- Volume: 3,050 cubic inches
- Weight: 3 pounds 2 ounces
- Torso length: 16 to 18 inches
- Volume: 3,350 cubic inches
- Weight: 3 pounds 5 ounces
- Torso length: 18 to 20 inches
- Volume: 3,660 cubic inches
- Weight: 3 pounds 8 ounces
- Torso length: 20 to 22 inches
About Gregory Mountain Products
Company founder Wayne Gregory--who designed his first backpack at 14 as part of a Boy Scout project--opened Gregory Mountain Products in 1977 in San Diego, California. From the start, Wayne wasn't just meticulous about designing packs that improved upon fit and used the best materials available, he also wanted to know how his designs worked in the field and what he could do better, a heritage of accessibility that has continued to the present. In the early days, he loved to talk tech with customers at his retail store in San Diego, asking for feedback on what worked and what didn't. Ultimate, Wayne realized that fit was king in the backpack business, and he pioneered many firsts, including being the first company to build backpacks in different frame, harness, and waist belt sizes; the first (and still only) pack manufacturer to develop a waist-belt system that adjusts to fit different hip angles, automatically improving load transfer; and developing the center-locking bar tack, a stitch that ends and locks off on the center of a seam instead of the side to improve strength at the major stress points. From the earliest days, Gregory packs were noted for their innovative design, ergonomic and comfortable fit, and high quality.