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Patagonia Nine Trails 18 - Women's Review

Though recently updated, this pack is still far from what we want in a daypack
patagonia nine trails 18 for women daypack review
Credit: Backcountry
Price:  $130 List
Manufacturer:   Patagonia
By Maggie Nichols ⋅ Senior Review Editor  ⋅  Jan 7, 2020
  • Comfort - 25% 3.0
  • Versatility - 25% 5.0
  • Weight - 25% 6.0
  • Ease of Use - 15% 4.0
  • Durability - 10% 7.0

Our Verdict

Despite being recently updated, the Patagonia Nine Trails 18 just doesn't live up to basic daypack expectations. The extremely narrow shoulder straps rub uncomfortably against your neck and the U-shaped top zipper provides only a very small opening to the main storage compartment. In addition, this bag's awkward shape is surprisingly difficult to pack and the side water bottle pockets are almost unusable without taking the bag off. Though there are many Patagonia products we love, this daypack, unfortunately, isn't one of them.
Lots of pockets
Multiple sizes
Thick padding
Shoulder straps too close together
Many usability flaws

Our Analysis and Test Results

Previously tested in the 26-liter size, we retested the Nine Trails in the 18-liter version. It's made of 210-Denier Cordura ripstop nylon with DWR treatment and comes in two sizes; S/M (which we tested, with a 16 to 19-inch torso and 28 to 36-inch waist) and L/XL (19 to 22-inch torso, 32 to 42-inch waist).

Performance Comparison

patagonia nine trails 18 for women daypack review - testing the nine trails on a frosty oregon morning.
Testing the Nine Trails on a frosty Oregon morning.
Credit: Maggie Brandenburg


This pack earns one of the lowest scores in our review for comfort. Though it has ample shoulder and hip belt padding, the shoulder straps are uncomfortably close together. The previous version was even closer together and less comfortable, and though this latest model is slightly better, it's still not our favorite. Unless we wore the pack much lower than it's intended to be worn, the straps rub uncomfortably against the sides of our necks. We had several friends test it out too, to make sure it wasn't just a complaint of our main tester, and they all reported having the same issue. Though women's daypacks typically feature more narrow shoulders, this is a little too extreme for our comfort.

patagonia nine trails 18 for women daypack review - though a slight improvement from previous versions, the thickness of...
Though a slight improvement from previous versions, the thickness of these straps and narrowness between them make it uncomfortable to wear actually tightened up in its proper place.
Credit: Maggie Brandenburg


The Nine Trails, on paper, has all the same pockets as most similar-use daypacks. However, at just about every turn, we discovered these pockets aren't as user-friendly as they ought to be, which diminishes the bag's overall versatility. The bike light loop is vertically oriented when nearly every other bag's is horizontal to help ensure the light doesn't fall off. The side pockets fit regular 1-liter bottles just fine, but are so tall they're nearly impossible to access while you're wearing the pack. When you put a hydration bladder in the interior sleeve, threading the hose through either one of the very tight holes above the shoulder straps is a struggle. And once it finally is in place, the hose ends up covering one end of the poorly place internal zippered pocket. However, we do appreciate the ability to remove the sternum strap if you don't want to use it (or if you need to move it up or down in placement). Though if you do remove this strap, the hose clip for your water bladder leaves along with it.

patagonia nine trails 18 for women daypack review - threading a hydration hose through the very tight openings forces...
Threading a hydration hose through the very tight openings forces the hose to cross right over the top of the internal zippered pocket, which is quite annoying.
Credit: Maggie Brandenburg


At 25.3 ounces, this bag is on the lighter end of average of the packs we tested. While it doesn't come with a rain cover, the material is DWR treated with a polyurethane coating and does a pretty good job keeping your things dry from light to moderate rain. Though prolonged exposure or intense precipitation events will eventually get the best of this coating and wet the pack.

patagonia nine trails 18 for women daypack review - instead of an internal frame, the nine trails has this stiff piece...
Instead of an internal frame, the Nine Trails has this stiff piece of plastic zipped into it, which, in theory, you could remove if you wanted to cut weight. It's so tightly jammed in there though, that we're not sure if you'd be able to put it back if you removed it - we didn't.
Credit: Maggie Brandenburg

Ease of Use

Patagonia makes this bag in two sizes and two capacities. We tested the S/M for 16 to 19-inch torsos and 28 to 36-inch waists, and it also comes in L/XL for 19 to 22-inch torsos with 32 to 42-inch waists. Our main tester is 5 feet, 4 inches with a 17-inch torso and the S/M is about just right for her. Yet again though, this is about where what we like about this bag ends. We once again find the Nine Trails is lacking a lot of extra adjustment features we've come to appreciate. While the 26-liter version has load lifter straps, the 18-liter version doesn't. A single side buckle is all it offers for load cinching, which often just isn't enough to stop contents from bouncing around. The hip belt also tightens by pulling the tails backward rather than forward, which is much more challenging to get an even fit.

This pack is also surprisingly challenging to pack correctly and very difficult to dig around in. The top opens with a U-shaped dual zipper that easily catches going around the tight corners of the squared U-top. Though it opens the entire top of the pack, the zippers don't extend down the sides at all. This means you have to perfectly plan your packing strategy every time, as unless you pull out all the items on top, it's nearly impossible to reach the jacket you crammed in the bottom. We tried using this bag as a crossover commuter/travel bag, just to see how it handles those contents. It does fit a full-sized laptop in a sleeve, but it's a bit awkward. In fact, the more awkwardly shaped objects we put inside this bag, the harder it was to pack effectively. When preparing for a trip using this bag as a personal item carry-on, we packed it with a laptop, notebook, magazine, Kindle, charging cords, extra layer, water bottle, etc., and could barely fit it all in. It was also exceptionally challenging to locate what we needed on short notice through the narrow top opening, like looking down a long, full tube trying to see what's at the bottom.

patagonia nine trails 18 for women daypack review - the side pockets are very tall - which keeps your water bottle...
The side pockets are very tall - which keeps your water bottle secure but makes it incredibly difficult to get it in and out of the pocket while wearing the pack!
Credit: Maggie Brandenburg


This is where the Nine Trails shines brightest. The outside is made of 4.2-ounce 210-Denier Cordura ripstop nylon and treated with a DWR finish and polyurethane coating. The interior lining is 3.3-ounce 200-Denier polyester and the bottom of the bag is reinforced with a thick panel. It does have the typical, exposed mesh outer pockets on the sides and front, but we didn't have any issues with them snagging or tearing during our several months of testing. Patagonia also backs their products with free lifetime repairs, which is an excellent policy for any piece of outdoor gear.

patagonia nine trails 18 for women daypack review - the best thing about the nine trails is that it's built well.
The best thing about the Nine Trails is that it's built well.
Credit: Maggie Brandenburg


Though less than the 26-liter version by a good margin, the Nine Trails 18 isn't cheap. Considering our testers' pretty universal dislike of the comfort of this pack and numerous issues with its usability, we just don't think it's worth your hard-earned money. Even if you're a die-hard Patagonia fan and are excited about a durable bag, we think there are far better options out there - and most of them cost less too.


As much as we wanted to like the Patagonia Nine Trails, it just doesn't impress us. It's particularly lacking when it comes to comfort and ease of use — and doesn't even have a price tag that might make it more worth consideration. We hope future iterations of this bag are more comfortable and user-friendly than this one.

patagonia nine trails 18 for women daypack review - as much as we want to be, we're not big fans of the nine trails'...
As much as we want to be, we're not big fans of the Nine Trails' actual performance.
Credit: Maggie Brandenburg

Maggie Nichols
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