Product Search
Product Search
Take 20% Off a Full Price Item
Join our FREE Inside Edge Program!Details
Item # GRG1E201M

Gregory Katmai 55 Internal Frame Backpack

Purchase Katmai 55

You Save


Please select product options to add to your cart.
100% Satisfaction Guaranteed
Shop with Confidence.

Gregory Katmai 55 Internal Frame Backpack

By Troy

Enwild Gear Specialist

The Enwild Difference

Real People
Real People
Connect and #HikeRunRoam with us!
Awesome Gear
Awesome Gear
Get the inside edge on the outdoors.
Amazing Service
Amazing Service
Because you deserve it.
The latest evolution in Gregory carrying comfort, the Katmai 55 backpack and its FreeFloat 360 suspension system provide load-hauling capability while minimizing weight and offering the fit and flexibility to ensure that movement is unhindered as you log big trail miles!


The latest evolution in Gregory carrying comfort, the Katmai 55 backpack and its FreeFloat 360 suspension system provide load-hauling capability while minimizing weight and offering the fit and flexibility to ensure that movement is unhindered as you log big trail miles!

Consisting of a lightweight steel alloy perimeter frame, a fiberglass anti-barreling stay, and super-ventilated trampoline-style mesh backpanel, the pack's FreeFloat 360 suspension system enables the pack to comfortable carry up to 45 pounds, shed excess heat to keep you cool, and mirror your every movement. The auto-fitting shoulder harness rotates in tandem with your motion and Gregory's Comfort Cradle lower back system further enhances maneuverability. Strategic foam placement provides cushioning where you need it most and otherwise allows full ventilation. An odor-control treatment of the backpanel fabric helps to keep the pack fresh even after long days and repeated use.

The pack comes in two torso length-adjustable sizes to make certain that backpackers get an appropriate, customizable fit. The Small/Medium size best fits torso sizes ranging from 15"-19" and the Medium/Large best fits 18"-22" torsos. Load-lifter straps, shoulder strip and hipbelt adjustability, and an adjustable sternum strap with a built-in safety whistle enable you to fine tune overall fit.

The 3000+ cubic inch pack has traditional top-loading access but can also be reached through a convenient side zipper. A lower zippered compartment is ideal for stashing your sleeping bag. A divider between the two compartments can be removed to convert to a single large packbag. A large stretch pocket is great for stashing discarded layers or keeping items accessible without having to dig into the body of the pack. A large, zippered pocket beneath it has integrated organizational features.

Other features include a floating lid with dual storage pockets, zippered hipbelt pockets, side stretch mesh pockets, side compression straps, tuckaway canted side bottle pockets, a front harness sunglasses quick-stow attachment, and trekking pole loops. An internal sleeve and built-in hose pass-through make the pack hydration compatible (hydration system sold separately).

The Gregory Katmai 55 backpack is available in your choice of size and color options.

  • FreeFloat 360 ventilated backpanel with dynamic flex panels and auto rotating shoulder straps that move with the natural movements of your body
  • Moisture wicking ventilated backpanel with Polygiene Stays Fresh Technology - an odor control airmesh treatment that inhibits the growth of odor causing bacteria
  • Adjustable shoulder harnesses and torso length plus customizable hipbelt and 3D Comfort Cradle for hotspot free, body-hugging comfort
  • Auto-rotating, dual density shoulder harness with sternum strap featuring integrated safety whistle and hydration clip
  • Perimeter alloy frame and fiberglass anti-barreling cross-stay for stable load management
  • Full length side-loading access zipper for easy unloading and gear organization
  • Oversized front zippered compartment with mesh divider to keep items in order
  • Sunglass QuickStow system on shoulder harness for quick, secure and scratch-free access to your shades
  • Internal hydration sleeve with SpeedClip hydration hanger compatible with Gregory's 3D Hydro Trek Reservoir (reservoir not included)
  • Floating top pocket with large zippered compartment, small quick access pocket and an underside zippered pocket, reflective attachment points and key clip
  • SideWinder bottle holster for one-handed on-the-go water bottle access - tucks away when not in use
  • Side stretch mesh pocket with pass through for over-or-under compression
  • Front oversized stretch mesh pocket with secure buckle closure
  • Quick-pull drawcord closure and top webbing compression
  • Zippered bottom sleeping bag compartment with removable divider
  • Adjustable attachment loops and upper shock locks for trekking poles or ice axe
  • Custom ComfortGrip molded zipper pulls and molded webbing keepers for strap management
California residents: view proposition 65  Warning

Technical Specs

Best Use
Top Loading w/ Side Acess and Sleeping Bag Compartment
Detachable Daypack
Item Dimensions
Small/Medium: 28.7" x 12.6" x 16.5"
Medium/Large: 30.3" x 12.6" x 16.5"
Fits Torso
Small/Medium: 15"-19"
Medium/Large: 18"-22"
Fits Waist
Small/Medium: 25"-48"
Medium/Large: 27"-53"
Frame Material
Steel Alloy and Fiberglass
Hydration Compatible
Maximum Weight
45 lb
Sternum Strap
Yes; Adjustable
Torso Adjustment
Small/Medium: 3051 cu in
Medium/Large: 3356 cu in
Limited Lifetime
Main Body: 210D High Density 40% Recycled Nylon & 420D High Density 45% Recycled Nylon with PFC-Free DWR
Bottom: 420D High Density 45% Recycled Nylon with PFC-Free DWR
Item Weight
Small/Medium: 4.61 lb
Medium/Large: 4.68 lb

No customers have reviewed this item.

Earn Gear Points For Reviewing Products

Join our FREE Inside Edge program and receive 20% off a full-price item. Earn discount points for reviewing items you purchase and receive exclusive discounts.

What are points?
As a member you can share reviews of items you purchase and we'll reward you with discount points valued at 5% of the item's original purchase price. It's EASY and it's FREE.

Sign Up Today