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Gregory Optic 48 Internal Frame Backpack


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Availability: In Stock!

Orders placed in the next 7:13 hours ship today!
Item # GRG1B203M
Weighing just 2.5 pounds but still providing load-hauling support and organizational features, the innovative Gregory Optic 48 internal frame backpack is ideal for ounce-counting hikers and backpackers.
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Weighing just 2.5 pounds but still providing load-hauling support and organizational features, the innovative Gregory Optic 48 internal frame backpack is ideal for ounce-counting hikers and backpackers.

The pack's suspension system utilizes a perimeter frame constructed of ultra-lightweight 7001 aluminum and includes anti-barreling support to ensure that weight is balanced and stabilized. Weight is transferred to the load-bearing lumbar support to minimize fatigue on your shoulders and back. A ventilated backpanel and dual-density padding in the contoured harness and hipbelt combine to increase comfort, fit, and breathability. Load lifter straps and an adjustable sternum strap further enhance fit and ensure stability. To ensure a customized fit, the pack is available in Small (best fits 16"-18" torso lengths), Medium (18"-20"), and Large (20"-22") size options.

The top-loading pack offers more than 3300 cubic inches of storage capacity. A protective top lid includes internal storage but can also be removed entirely when the additional storage isn't needed or you simply want to travel lighter. Even with the lid removed, a small, buckled flap protects the interior of the packbag. A large front stretch pocket enables you to keep discarded layers or other gear close at hand. Side compression straps allow you to cinch down the packbag to keep the contents of the pack stabilized and also double as external lash points.

Other features include large side stretch water bottle pockets, zippered hipbelt pockets, trekking pole attachments, a front harness quick-stow feature for sunglasses, and an included raincover. An integrated sleeve and exit port make the pack hydration compatible (hydration system sold separately).

The Gregory Optic 48 internal frame backpack is available in your choice of size and color options.

California residents: view proposition 65 WARNING

  • AeroSpan suspension offers 360 degree moisture wicking ventilation and tensioned perimeter frame load management while maintaining a lightweight design
  • Ventilated dual-density FocusForm shoulder harness and extra supportive hipbelt with targeted comfort zones
  • Leaf-spring lumbar pad for comfortable, energy-saving load transfer
  • Ultralight 7001 aluminum perimeter frame with anti-barreling support
  • Removable top lid
  • Ultralight weather flap for use without top lid
  • Raincover included in top pocket
  • Sunglass quickstow
  • Front stretch mesh pocket
  • Quick access water bottle stow
  • Internal hydration sleeve and port



Best Use Backpacking
Access Top Loading
Warranty Limited Lifetime
Volume Small: 2746 cu in
Medium: 2929 cu in
Large: 3112 cu in
Type Internal Frame Backpack
Sternum Strap Yes; Adjustable
Maximum Weight 30 lbs
Material Nylon
Item Weight Small: 2 lbs 6 oz
Medium: 2 lbs 7 oz
Large: 2 lbs 8 oz
Hydration Compatible Yes
Frame Material Aluminum
Fits Torso Small: 16" - 18"
Medium: 18" - 20"
Large: 20" - 22"
Dimensions Small: 26" x 13" x 11"
Medium: 28" x 13" x 12"
Large: 30" x 13" x 12"
Other Rain Cover Included


Real Customer Reviews

Average Rating:
(based on 3 real customer reviews)

3 Items

A good Gregory production
Reviewed by Wei Khoon Ng - July 25, 2018

Likes: With a awesome durable material.. Perfect lightweight, well side pocket for a water bottle and perfect sizing..

Dislikes: The hip belt pocket are too small and between the centre of both shoulder strap are too wide (have a hot-spots on my neck).. Maybe is cause of mine personal walking style..

Better than the Osprey Exos
Reviewed by Bill - June 23, 2018

Likes: A hiking buddy and I both ordered new packs this spring. I went with the Gregory Optic 48 and he went with the Osprey Exos 48. They are very similar in every aspect but we both prefer the Gregory for a few minor advantages like mine having hip belt pockets and his does not. My size medium weighs 2.47 lbs. It is rated for up to 30lbs although I haven’t had a wet weight over 15lbs yet. I’m totally confident that it could do that or more for longer/winter excursions. The shoulder straps and suspension feel beefy for such a light bag. It has everything you’d expect from a pack in this class. My personal favorites are the elastic sunglass holder on the shoulder strap, and the diagonally forward facing slots in the stretch mesh side pouches. While it has the normal top openings as well, smart water bottles ride perfectly there to drink on the move. Combined with the hip belt pockets for snacks and a mosquito head net, you’ll have to admit you’re tired if you want to stop for a minute..

Dislikes: I can’t think of a single dislike. Do be aware that you need to know your size before ordering because the shoulder straps are not adjustable. This is another plus, making it that much more minimalist.

Awesome first pack
Reviewed by Brent W. - May 6, 2018

Likes: good first pack for the price. Hipbelt pockets work well and the side drink pouch make it easy stow my water bottle.

Dislikes: none

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