Gregory Optic 58 Litre Rucksack

58 Litres / Internal Frame / Hydration Compatible / Designed to carry 16kg
Weighs 1104g (Medium size)
Code: SS18241
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An ultralight pack from Gregory means weight savings without the loss of practical features. Another top quality pack that looks great and performs even better with a super comfortable fit.

Gregory says:

Longer distances and winter temperatures require extra room. The Optic 58 gives you that additional capacity without compromising your ultralight priorities. Proper load management, moisture-wicking ventilation, and intelligent features keep you comfortable and mentally balanced from sea level to the High Sierra, because efficient trail travel involves more than a weight claim.

Gregory's Optic 58 Rucksack utilizes Gregory's new AeroSpan suspension system which is an ultralight version of their VaporSpan suspension. It delivers the same combination of 360-degree moisture-wicking ventilation and tensioned perimeter frame load management while paying obsessive attention to weight reduction. It also features FocusForm shoulder harness and hipbelts and LifeSpan foam to provide lightweight comfort that should outlast other weight-conscious cushioning materials.

The rucksack fits in a lot of features while still managing to keep the weight down. You even have the option of removing the lid and swapping it for the ultralight weather flap to go full on minimalist. The only small issue I had with this is that it can be a little fiddly to remove the lid and I would have preferred a simple clip instead of threading it through the buckle - yes it might have added a few extra grams but that's just my preference as I feel the more it gets used the more difficult it might become to remove and attach.

Overall it's a great pack for backpackers and hikers who don't want to carry loads any more than 16kg.

- Reviewed by Ultralight Outdoor Gear

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  • AeroSpan suspension with EVAP moisture wicking shallow-depth ventilated back panel
  • Ventilated, dual-density FocusForm shoulder harness and extra supportive hip belts with targeted comfort zones 
  • Leaf-Spring Lumbar pad for comfortable, energy-saving load transfer 
  • Ultra-light 7001 aluminum perimeter frame with Anti-barreling support
  • Included custom fitted rain cover stows in the top pocket for quick access in unexpected showers
  • Removable top zippered pocket to shed ounces and swap-in included ultra-light weather flap to stay protected (stows in top pocket)
  • Sunglass QuickStow system on shoulder harness for quick, secure and scratch-free access to your shades without taking the pack off
  • Quick access on-the-go water bottle stow access on both the right and Left sides
  • Oversized, durable front stretch mesh pocket for quick access organization
  • Dual zippered hip belt pockets provide secure, easy to access storage 
  • Dual stretch mesh side pockets with Large capacity for bottles, camp sandals, trekking poles 
  • Dual adjustable attachment loops and upper shock locks for trekking poles or ice axes 
  • Ultra-light V-Compression system on side and bottom of bags 
  • Lower side compression pass-through on side pocket for over/under option 
  • Gear attachment points on top pocket and main body
  • Max carry: 16 kg / 35 lbs
  • Frame: Size Specific Ultralight 7001 Aluminium Perimeter Frame
  • Fabric Body: 100D High Tenacity Nylon
  • Fabric Base: 210D High Tenacity Nylon
  • Fabric - Other: 135D High Density Polyester


  • Weight with lid: 1116g`
  • Weight without lid + weather flap: 1066g
  • Raincover weighs: 90g
  • Capacity: 55L
  • Dimensions HxWxD: 66 x 32 x 28 cm
  • Torso size: 41 – 46 cm
  • Hipbelt size: 66 – 114 cm


  • Weight with lid: 1156g
  • Weight without lid & weather flap: 1104g
  • Raincover weighs: 95g
  • Capacity: 58L
  • Dimensions HxWxD: 71 x 32 x 30 cm
  • Torso size: 46 – 51 cm
  • Hipbelt size: 71 – 122 cm


  • Weight with lid: 1208g
  • Weight without lid & weather flap: 1158g
  • Raincover weighs: 95g
  • Capacity: 61L
  • Dimensions HxWxD: 76 x 32 x 32 cm
  • Torso size: 51 – 56 cm
  • Hipbelt size: 76 – 135 cm
Showing 2 of our total 3 reviews, with an average rating of 4 stars. Read all 3 reviews for Gregory Optic 58 Litre Rucksack.
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Review Summary - 4 out of 5 based on 3 ratings.
September 8, 2019 | Victor
Decent entry into the lightweight category

I bought the Gregory Optic 58 instead of the more well-known and established Osprey Exos 58, mostly because the load is placed closer to the spine, and because I wanted hipbelt pockets. The features of the pack are good, and I am happy that you can replace the lid with a flap for shorter trips (this is not removable in the Exos). I am used to Osprey's generous internal volumes (each manufacturer seems to measure this differently), so I was a little let down when I felt I couldn't fit 14 liters more than in my Osprey Talon 44 (the volume increase was probably closer to 10 liters). But this pack can still comfortably carry one week's worth of food and gear, including a tent, for three-season hiking. It's very ergonomic for such a light pack and you can comfortably load it with around 15 kg before you start feeling the weight. I am only giving it 3 stars because there are some construction issues. The first time I tightened the top load strap (that connects the front of the pack to the frame) the buckle broke! This is clearly an oversight by Gregory, the buckle is very small and made of a thin, brittle material. I quickly replaced it with a repair buckle (though oversized for the thin strap), and it has held since. This is a poor design choice, as that strap is typically quite heavily loaded. Looking at the rest of the pack, it seems Gregory has opted for keeping most features of a heavier pack, and made them all lighter. This compromises the structural strength of some components. A second annoyance is the top seam on the lumbar pad, which, if the pack isn't carried a certain way, can cut into the skin of your lower back. I have read other reviews that complain about this, and it seems like such an obvious oversight (the seam would have easily been covered by felt, which I am considering doing myself). At this price (more expensive than the Exos), I find these oversights unfortunate. This is (as I understand) Gregory's first attempt at a lightweight backpack (not quite ultralight as that is another category), and it is alright. It is disappointing that they have not done a better job testing the pack before it hit the market, but hopefully reviews will lead to a much improved second generation, which could truly give the Osprey Exos a run for its money.

Ultralight Outdoor Gear Limited
August 29, 2019 | Paul

Just as comfortable as my Osprey Xenith and less than half the weight - really pleased. Pockets are a good size and accessible without dislocating anything. Also, some nice features like the glasses holder, interchangeable hoods and a rain cover included. I also exceeded the max carry weight by 3-4kg without instability or discomfort. Good pack if you want to cut a few kilos off your base weight without sacrificing campsite comforts.

Ultralight Outdoor Gear Limited