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Gregory Mountain Products Men's Optic 55 Ultralight Backpack

4.0 4.0 out of 5 stars 30 ratings
Currently unavailable.
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  • On-the-go bottle Stow - Trail accessable stretch mesh water bottle pocket
  • Sunglasses Quickstow System - Quickstow system on shoulder harness for a secure, scratch free way to store your sunglasses
  • Ultralight weather Flap - Swap out the Top zippered pocket and go even lighter with the included ultralight weather flap
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From the manufacturer


AeroSpan Suspension

AeroSpan is the ultra-light evolution of our groundbreaking VaporSpan suspension, delivering the same combination of 360-degree moisture-wicking ventilation and tensioned perimeter frame load management while paying obsessive attention to weight reduction. Using body-mapping techniques to target friction and impact points allows us to eliminate hotspots without excess padding. FocusForm shoulder harness and hipbelts and LifeSpan foam provides lightweight comfort that outlasts other weight-conscious cushioning materials.

  • 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

Optic 58

Weight: 2.39 lbs. | Body Dimensions: 26" x 12.5" x 10.5"

Longer distances and winter temperatures require extra room, and 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.

  • Custom fitted raincover included (stows in top pocket)
  • Removable top lid with ultra-light weather flap included (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 side
  • Oversized, durable front stretch mesh pocket for quick access organization
  • Dual zippered hip belt pockets provide secure, easy to access storage
  • Internal hydration sleeve and port
  • Dual adjustable attachment loops and upper shock locks for trekking poles or ice axes
  • Ultra-light V-Compression system on side and bottom of bag
  • Lower side compression pass-through on side pocket for over/under option
  • Gear attachment points on top pocket and main body
  • AeroSpan suspension with EVAP moisture wicking shallow-depth ventilated backpanel

Pack Details

Removable Top Lid

Removable top zippered pocket to shed ounces and swap-in included ultra-light weather flap to stay protected (stows in top pocket).

Custom Fitted Raincover

Included custom fitted raincover stows in the top pocket for quick access in unexpected showers.

Sunglass QuickStow

Sunglass QuickStow system on shoulder harness for quick, secure and scratch-free access to your shades without taking the pack off.

Front Stretch Mesh Pocket

Oversized, durable front stretch mesh pocket for quick access organization.

Quick Access Water Bottle Stow

Quick access on-the-go water bottle stow access on both the right and left sides.

Internal Hydration Sleeve and Port

Product Description

Longer distances require extra room, and the Optic 58 gives you the additional capacity without compromising your ultralight priorities. Moisture-wicking ventilation and an included raincover keep you moving confidently down the trail.

Product information

Technical Details

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Gregory Mountain Products Men's Optic 55 Ultralight Backpack

Gregory Mountain Products Men's Optic 55 Ultralight Backpack

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Customer reviews

4 out of 5 stars
4 out of 5
30 global ratings

Customers say

Customers like the weight and comfort of the backpack. For example, they mention it's very light, and transfers the weight more efficiently. That said, opinions are mixed on durability.

AI-generated from the text of customer reviews

7 customers mention7 positive0 negative

Customers find the backpack very light and comfortable. They say it transfers the weight more efficiently.

"I really love everything about this pack – it’s adjustable, lightweight and hugs your hips – except the durability of the plastic hardware is..." Read more

"...just because it rides a little better on my body and transfers the weight more efficiently. It was so close to being a home run for Gregory...." Read more

"I love this bag, so lightweight. Looks like it’s made well.UPDATE: I just used it on a two day hike. It was comfortable, held up well...." Read more

"...Unfortunately, while this pack is indeed light, it misses the mark for overall use-ability. Will be returning this pack." Read more

5 customers mention5 positive0 negative

Customers find the backpack incredibly comfortable, light, and hugs their hips. They also say it's adjustable and can carry not very heavy loads. However, some customers have concerns about the durability.

"...in to where you are not carrying extra gear, this pack is incredibly comfortable...." Read more

"...love everything about this pack – it’s adjustable, lightweight and hugs your hips – except the durability of the plastic hardware is questionable...." Read more

"...UPDATE: I just used it on a two day hike. It was comfortable, held up well. I can’t believe how lightweight it is. Very useful features...." Read more

"...After packing 25 lbs in it, He tells me it's very light & comfortable. He can't wait to go on a backpacking trip...." Read more

9 customers mention3 positive6 negative

Customers are mixed about the durability of the backpack. Some mention that it held up well, while others say that it has poor construction and materials. The durability of plastic hardware is questionable, and the pack is surrounded by weak mesh. It broke during the first day out with less than 20 pound on it. The fastening hardware in general does not feel sturdy.

"...lightweight and hugs your hips – except the durability of the plastic hardware is questionable...." Read more

"...Have only done a few trips so far, but have had no durability issues...." Read more

"...Yes, the mesh (and side pockets) can be not super-durable since the tissue is thin, but I always use the rain cover even in the absence of the rain..." Read more

"...Since this weak mesh surrounds the outside of the pack, I can't imagine it not being damaged if you use this pack regularly in the wilderness...." Read more

Lumbar Pad Chafes Under a Light Load
2 Stars
Lumbar Pad Chafes Under a Light Load
This is for the Optic 58:The lumbar pad has a seam running along the bottom where a piece of heavy duty nylon is sewn. I could not feel the seam while wearing the pack with just a sleeping bag inside for filler, but when I put 15 lbs of gear inside (pack is rated for 35 lbs), I could feel it rubbing against the small of my back. It was irritating enough that I felt chafing would develop with continued use. I returned the pack, which is a shame because I really liked the rest of it. If the lumbar pad gets redesigned and that seam removed, I would definitely revisit purchasing.EDIT: I just wanted to also mention that the bottom of the frame is actually below the lumbar pad. This focuses all the weight right on that seam and not the lumbar pad. You can see what I'm talking about in the photo.
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Top reviews from the United States

Just another shopper!
5.0 out of 5 stars Great light weight pack with comfort.
Reviewed in the United States on September 23, 2021
Verified Purchase
Comfortable pack and 2 lbs. lighter than my old Osprey. Will still use the Osprey for heavier loads, but if you get your gear dialed in to where you are not carrying extra gear, this pack is incredibly comfortable. Have only done a few trips so far, but have had no durability issues. I carry a few Sea to Summit replacement buckles based on some other reviews, but have not needed them yet. Ventilated back panel is awesome.
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Living in Winchester
4.0 out of 5 stars I really love everything about this pack – it’s adjustable
Reviewed in the United States on June 12, 2018
Verified Purchase
I really love everything about this pack – it’s adjustable, lightweight and hugs your hips – except the durability of the plastic hardware is questionable. On the second day of backpacking (with only 28lb total pack weight), the plastic on the synch strap that goes over the top opening of the pack broke while synching it down. I called Gregory and they said to send it back to the retailer which I did and ended up buying another one. I think Gregory went too far in trying to get this pack (size large) down to 2.52 lbs. I would give this pack 5 stars if the hardware was more durable – everything about it is wonderful except for the cheap plastic.
3 people found this helpful
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Ivan
5.0 out of 5 stars It is light and comfortable to carry not very heavy loads.
Reviewed in the United States on May 13, 2019
Verified Purchase
I like this backpack. Yes, the mesh (and side pockets) can be not super-durable since the tissue is thin, but I always use the rain cover even in the absence of the rain to protect the backpack from dust and scratches. I believe, 10-12 kg is the "comfortable" weight, but it manages to be operational even at higher loads, but I would not recommend.
One person found this helpful
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Trouser Slacksman
3.0 out of 5 stars Great Pack... But Wait For Version 2...
Reviewed in the United States on April 29, 2018
Verified Purchase
I just took this brand new pack on its first hike up Mt. Waterman in the Angeles National Forest. The pack had never seen light before and I was excited to try it out. The hike was a relatively easy one, though we had some steep inclines to trudge up, there was no bushwhacking and the trip to camp was only 1 mile. The pack was filled to its weight limit and rode like a dream. I was loving it the whole hike up. When we finally reached camp, I lightly brushed up against a rock while taking off the pack. This was not a hard impact mind you, just a light brushing where the pack came in contact with about an inch of rock. A hole was ripped on the mesh pocket holding my Nalgene bottle. I couldn't believe it. I had owned the pack for about 6 hours and it had only traveled a mile. It was already messed up. Hmmmm....

Truthfully, I really want to love this pack. It's a fantastic design (though it looks oddly identical to last year's Exos). I think Gregory has a much better suspension system than Osprey. With the Optic they found that perfect balance between having the pack close to your back for balance, but far enough away for air flow. I find that the Osprey packs always feel a little too far from your back which throws off your center of gravity. I also feel like the Gregory suspension system transfers the weight to your hips a little better than the Osprey's.

The Optic is very lightweight. Obviously the Exos was selling so well that Gregory had to step in. They're a little late to the game, but a welcome player. However, this is their first version of this pack, and in the pursuit of shaving off ounces, they went a little too far with the mesh material in my opinion. The whole pack is surrounded by this weak mesh, which means you will need to treat it like a baby (and keep it away from them for that matter, babies ruin EVERYTHING). Make sure you don't bump anything while walking outdoors with this pack on and be careful setting it down! Act like you're hauling 58 liters of porcelain and faberge eggs!

Really though... who wants to baby their backpack? Second only to your boots, this piece of equipment should be able to handle abuse above all your other gear!!

I think for version 2, Gregory really needs to beef up the durability of the outer stretch mesh, even if it means gaining a few ounces on the pack. Since this weak mesh surrounds the outside of the pack, I can't imagine it not being damaged if you use this pack regularly in the wilderness. Other than the mesh, the pack is stellar. I do think it is better than the Exos just because it rides a little better on my body and transfers the weight more efficiently. It was so close to being a home run for Gregory. Unfortunately, the mesh is a big enough issue to make me return it. It failed on a very easy hike. How is it going to survive when I actually venture off into the woods? And what will it look like a year from now? For now, I will wait for the second revision of the Optic. I think if they can beef up the outer mesh, they'll have a real winner on their hands.
27 people found this helpful
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Travis S.
5.0 out of 5 stars Superlight yet sturdy
Reviewed in the United States on September 28, 2018
Verified Purchase
Just looking at it I thought it would shred to pieces as I loaded it. Held up well, I had about 20 lbs of gear, tent, sleeping bag, food, water all inside the main compartment. Went on a 18 mile hike through woods and by rock bluffs, scraped it a few times on stuff and no problems or rips. Love the pockets on the hip belt for little stuff.
3 people found this helpful
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KenM
5.0 out of 5 stars Nice bag, lightweight!
Reviewed in the United States on January 16, 2019
Verified Purchase
I love this bag, so lightweight. Looks like it’s made well.

UPDATE: I just used it on a two day hike. It was comfortable, held up well. I can’t believe how lightweight it is. Very useful features.

I love it!
One person found this helpful
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Sarah Cox
1.0 out of 5 stars Broke after 15 minutes of hiking...
Reviewed in the United States on October 23, 2019
Verified Purchase
Chest strap broke in the first 30 minutes of a 24 mile hike. Waist and shoulder straps do not stay tight while hiking. Perhaps because they are so thin coupled with poor quality hardware? Fastening hardware in general does not feel sturdy. We have other Gregory packs that are great. Unfortunately, while this pack is indeed light, it misses the mark for overall use-ability. Will be returning this pack.
2 people found this helpful
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barginharry
4.0 out of 5 stars Light & comfortable.
Reviewed in the United States on February 18, 2022
Verified Purchase
I have 2 Gregory's & love their packs. My Son wanted a new pack & wanted to give it a try.

After packing 25 lbs in it, He tells me it's very light & comfortable. He can't wait to go on a backpacking trip.

As for durability, We would have to see how it holds up on several trips.
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