Ultimate Direction PB Adventure Vest 3.0 Review

What do you do if your next series of adventures requires somewhat of a ‘pack it all and the kitchen sink, too’ approach to gear selection? What if you only want one pack for all runs over a few hours but may also include times when stashing a puffy, some microspikes, and an ice axe will be desired? Ultimate Direction has made some serious improvements to the Peter Bakwin Adventure Vest this year, and the 3.0 is an incredible pack that demands attention. The Ultimate Direction PB Adventure Vest 3.0 ($169.95) now boasts 16 liters (977 cubic inches) of storage capacity, which is an increase of five liters from the 2.0 version, yet the pack has decreased in weight by three ounces to 13.2 ounces. I’ve been doing my best to put this pack through some burly tests, and thus far, it’s passing them all with flying colors.


The 3.0 vest fits differently than previous versions. Ultimate Direction has included a new sizing chart and measurement map that requires a measurement of the bottom ribs. The pack comes in unisex (I’d call it more of a men’s fit than a women’s) small, medium, and large, which currently covers lower-rib-cage measurements from 24 to 46 inches. It’s interesting to note that with the 2.0 pack, they added an extra-large size awhile after the initial release, perhaps in response to customer feedback. I’m curious if that will happen with the 3.0 or if the new size ranges are adequately inclusive.

I wear a 34A sports bra and measure 29 inches around the bottom of my ribs. This put me firmly in the small size, which fits perfectly. Incidentally, I had the opportunity to try a medium out in a store to compare, and though I liked the increased size of the side pockets of the medium, I was unable to cinch it down sufficiently to hold the load stable. With the adjustability of the hidden side straps and the front straps, significant customization is possible even if you’re between sizes.


Front view of the Ultimate Direction PB Adventure Vest 3.0. All photos: iRunFar/Kristin Zosel unless otherwise noted


I tested the fit and comfort of this pack out in the most direct way possible. I received the pack on a Wednesday. I loaded my pack up with random mountain gear and did a two-hour test run/hike on Thursday on my favorite Guanella Pass area trail. It passed with flying colors. On Saturday, it was fully loaded with gear for a high-mountain 50 miler with nine slow mountain miles between some aid stations and at least a third of the race around 13,000 feet. Who says you shouldn’t try new things on race day? I had nary a chafe mark and only a small sore spot on one rib where the rim of a bottle in the burrito pocket was pressed after it was empty and deflated with a full bottle on top—rookie error. The pack allows the weight of the load sit right in the sweet spot (for me) of slightly lower on my back and correctly balanced front to back whether it’s completely full or on the lighter side.

I have further used the pack for pacing many hours at Hardrock, several long days in the mountains, and for a night adventure on a 14,000-foot peak complete with scrambling and off-trail time. I definitely ‘packed for my fears’ on that one and maxed out the 16-liter volume and weight-carrying capacity of the pack. Yet again, I had no chafing and a small sore spot on one rib where, amazingly, I did the same thing with a soft water bottle as in my 50-mile race. I’m slow to learn. In all these miles, I’ve worn the pack over several combinations of the following: a thin synthetic shirt, one or two wool layers, a lightweight wind jacket, a waterproof jacket, and a thin puffy. There’s no bounce and no difficulty in adjusting the front straps to alter the fit on the fly as needed.

I can in all honestly say I love this pack. It has completely replaced my 12-liter pack and an older larger-capacity pack I’ve had for years from other brands. I’m psyched to conjure another adventure where I get to use the pack because I know I can fill it, set it, and forget it, which allows me to focus on the journey itself.


Side view of Ultimate Direction PB Adventure Vest 3.0.


It’s clear that a significant amount of design, testing, and adventure experience went in to the PB Adventure Vest 3.0. The entire pack is edged in a thick but non-rigid, very-soft-fleece material—the most comfortable edging of any pack I’ve tried. It helps with moisture management around the neck and underarms but interacts completely peacefully with any exposed skin while not creating friction against any wool or synthetic shirt or jacket.

The 150-grams-per-square-meter (GSM) Knit Mono Mesh makes up most of the pack that comes in contact with your body with the exception of two stretch panels on the sides. This translucent fabric is relatively smooth and has small uniform perforations that enhance air flow and moisture management while riding smoothly against the skin or clothing. It provides a conforming feel as you cinch the pack and amazingly does not eat your shirt (cause it to rise up under the pack into a clump about mid-ribs) as you run up and down mountains or pound over a jeep road.

The aforementioned side panels utilize 180 GSM Darlington Power Mesh, which has larger micron holes and a stretchier feel. My rib cage loves the expansion ability this allows as I power up the steep inclines and less-than-gracefully descend without needing to adjust any straps. This Power Mesh is also used to form the stretchy pockets on the outside of the pack in the front, sides, and the back. This allows extra food, fluids, and gear to be stored securely without having gaping pockets when they’re not in use.

Anecdotally, I’m wondering if this pack doesn’t get better with age. I’ve watched the video of Peter Bakwin and his pack several times on the Ultimate Direction website, and I’m always impressed with the stretchiness of the external pockets on his pack and the amount of stuff he fits in with ease. While my ‘still-newish’ pack holds plenty, I think the Power Mesh will continue to accommodate to varying loads and may expand over time as the elasticity gives a bit, but it doesn’t seem that it will ever give so much as to become sloppy. I think this will be a bonus… except for the fact that increasing the weight in my pack beyond its current state is perhaps not the best idea for my body.

The zippers and bungees all have pull tabs that are very easy to adjust with bare and running-gloved hands. The smooth-pulling zipper angles are also such that no contortions are needed for the front and side pockets. The pockets in the rear require me to take off the pack.

The rest of the main body of the pack utilizes SilNylon/66, a silicone-impregnated 30-denier nylon with a polyurethane face. It has a crinkly feel and sound, but because it forms the larger-capacity pockets rather than the body of the pack, it’s not annoying at all when running. Hilariously, there have been a few times where my ponytail has hit the material just right so as to make me think a small creature had landed near my neck. Some squealing, arm-flapping, and embarrassed chuckling may have ensued.

The SilNylon material likely makes the pack less breathable than it otherwise would be because it makes up the largest pocket on the back of the pack thus trapping the heat from your body against the hydration pocket and your back. On the flipside, it keeps the gear well protected from dust and debris without adding weight. Though I am not a heavy sweater, I do find the pack runs a bit warm. Since I wear it in the typically cool and breezy Colorado mountains primarily, I don’t mind it. It acts like a base-layer tank top and saves me from needing that piece of clothing. One of my frequent running partners does note that because of her sweat rate, she prefers to use a thin plastic bag to protect stored layers from the moisture if she’s using the pack in the heat.

Though it’s billed as waterproof, I found it to be water resistant in the same way a lightweight, breathable rain jacket is. It works well for a mist or mild sweat and when a strong breeze is present, but if the moisture rate is higher and the wind is calm, the moisture likes to hang out inside the pockets and against one’s back. To me this isn’t a big deal as I don’t live in a hot or rainy climate, and I use a Ziploc bag for my phone or very important gear anyway. The huge positive of the SilNylon is that it’s wear- and snag-resistant. I took it straight down an avalanche gulch choked with bushes and deadfall and all sorts of nature’s debris and came out the other end without a scratch or a snag anywhere on the pack. For the number of times I scuffed along the debris, I was impressed.


Back view of the Ultimate Direction PB Adventure Vest 3.0.


The specs for the PB Adventure Vest 3.0 state 16 liters (977 cubic inches) and an unloaded weight of 13.2 ounces/377 grams (14.43 ounces/412 grams with two 500-600 milliliter soft bottles). The bottle pocket and burrito pocket can easily hold 20- to 26-ounce bottles as well. The pack has room for up to a 100-ounce bladder in the hydration pocket for a grand total of around 1.5 gallons of fluid should you so choose. As a personal example, I can state based on my max load thus far, that 16 liters of room allows for the following items:

Front Pockets and Attachments:

  • 2 trekking poles stored in the quick-release bungees on either side of the front shoulder straps
  • 2 full soft bottles (17 to 20 ounces) stored in the burrito pocket
  • 1 soft bottle in the regular front bottle pocket
  • pills and lip balm in a plastic bag in the anterior shoulder pocket on one side
  • 4 gels in the other anterior shoulder pocket beneath the attached emergency whistle
  • 2 pouches of blocks on one side and two pureed food pouches and trash in the other stretchy pockets on the outside of the water-bottle pockets
  • 200 calories of energy food in the small anterior zip pocket
  • My phone (in a baggie) fits in the burrito pocket if I only have one soft bottle sharing the space

Incidentally, the front-stowing pole bungees are my all-time favorite feature of the pack. I can attach and detach the poles while powerhiking and without removing my pack or requiring any amazing arm mobility, and there’s no bounce or arm chafing from their placement. This is a revolutionary advancement in pack design, in my opinion.

Side Pockets

Perhaps because I have a size small, the side zip pockets and hidden pocket behind it don’t provide much space for storage both in available volume and the fact that it presses directly on my ribs. I keep it soft and simple here and just use it for a Buff and some toilet paper in a baggie. The medium and large packs have larger pockets here to facilitate the increased size of the pack—fill away. I should note that I can get into these pockets without removing the pack or significantly slowing my pace.

Rear Pockets

  • 50 ounces of water in a hydration bladder in the hydration pocket with attachment loop against my back
  • Folded space blanket, key fob, ID, and emergency tape in a plastic baggie in the small zip pocket on the side of the main compartment
  • The large main compartment contained a headlamp and spare batteries in a baggie, a pair of rolled lightweight softshell pants, waterproof gloves, an iPhone 6 in a baggie, and a pair of sunglasses
  • The upper stretch mesh pocket held 600 more calories of various foods
  • The lower stretch mesh pocket held a second headlamp with extra batteries in a baggie and a flexible brimmed cap
  • I used the bungees on the rear of the stretch pockets to attach a lightweight waterproof jacket

This was not my most careful rolling and packing job, but it did the trick, and still, the pack did not bounce or restrict my breathing in anyway. My guess is more could be added if the adventure required. This fully fits the bill for me as a four-season adventure pack. An insulated hydration bladder pouch and tube cover could be added with ease and still allow for the routing of the tube through the left shoulder and behind the burrito pocket. If you’re comfortable sleeping on the ground, it could easily be a fastpack. It has ice-axe attachments for the facilitation of winter adventures and plenty of stretchy storage space for microspikes though I’d put them in a cordura bag to save your pack. One final note on the back pockets, I have to take off the pack to access what’s stored in them.

So what if you don’t need your entire gear locker with you on a run with this pack? No problem. You can go fairly light on what you carry and still enjoy the same smooth, no-bounce, no-chafe ride with a few pulls on the two front sternum straps that further adjust up or down the sliding rail to dial in the fit.


The Ultimate Direction PB Adventure Vest 3.0 in action. Photo: Chuck Stone

Overall Impressions

This is an absolute workhorse of a pack and a joy to use. The superior comfort and fit, the secure ride of the pack over all types of terrain with a variety of loads, and the durability thus far all allow me to give a fully five-star, two-thumbs-up, enthusiastic rating to the Ultimate Direction PB Adventure Vest 3.0. If your adventures are time-, gear-, and conditions-intensive, it’s hard to beat the 13-ounce/16-liter capacity of this vest. Expensive? Perhaps, but I bet the dollar-per-adventure ratio proves to yield an incredible bang for your buck. It’s simply an outstanding running and adventuring pack.

Call for Comments (from Meghan)

  • Are you adventuring in the Ultimate Direction PB Adventure 3.0 pack? If so, what are your overall impressions of the pack?
  • For those of you who have worn previous iterations of this model, can you share your thoughts on the specific changes to this edition?
  • What kinds of adventures have you taken the pack on and what kinds of things have you managed to stow in the pack?

[Editor’s Note: If you’re affiliated (i.e., an employee, ambassador, etc.) with brand that produces hydration packs, please share your relation in each of your comments on this article. Thanks!]


The Ultimate Direction PB Adventure Vest 3.0 in action from the back. Photo: Chuck Stone

Kristin Zosel

is a mom, wife, ultrarunner, physical therapist (on sabbatical), and transcriptionist for iRunFar.com. Her love of steep uphills, high mountain environments, and Swiss “lovely cows” keep alpine visions dancing in her head and strong cappuccinos in her mug.

There are 22 comments

  1. WeiDe

    How does this vest compare to the limited edition Hardrock Vest? It is bigger, right? I read that the Hardrock Vest is similar to the Scott Jurek one, but i think there are some differences?

    1. Kristin Z

      11.6L capacity and 11.2oz are the Hardrocker specs vs the 16L capacity and 13.2oz of the PB Adventure vest. The Hardrocker also sits a bit higher on my back than the PB. Both are great vests. For further more tech info as well as a great explanatory video, see the Ultimate Direction website specifically.

  2. Andre Blumberg

    Agree this is a top vest for long adventures. Have used this in each of the four ultras comprising the German Millennium Quest in April/May 2016, ranging from 219km to 320km. Vest worked like a charm, really good fit, no bouncing, ample space and plenty pockets. Top!

  3. OPUS solution

    I’m guessing that the sizing is similar enough to the SJ vest to draw generalizations. My 5’8 155lb frame is too fat for the size small, and too skinny for a medium to comfortably fit. casual look at other reviews shows I’m not the only one. I guess UD doesn’t have anyone my size on its test mule roster.
    The front loading trekking pole loops though, if I’m the sort of runner who runs where I could know what an ice axe looks like, maybe I’d enjoy not driving a pole spike through my chin while scrambling up something a tad steep? Nevermind that I will never have tri-folding poles, I ski with the poles I run with and will never use snappy toothpicks. Points for actually trying something new, good job UD.
    Not that my complaints mean much since the pack doesn’t fit the typical skinny guy who runs steep things.

    1. Kristin Z

      At the risk of pointing out the obvious:
      1. Front loading trekking pole loops are for trekking poles and indeed the trifolds fit best. They certainly don’t get in one’s way if you choose not to use them.
      2. Ice axe loops are in the rear like all the packs I’m aware of.
      3. There are so many options for bungee use and etc on the rear that full length poles could easily be stowed in the rear if that was someone’s preference.
      4. Hope you find a brand and sizing structure that fits you as well as this pack fits me. I haven’t tried the SJ pack so I can’t attest to the sizing similarities or differences.

  4. Michael Miller

    Does anyone know if they, toughened up the loops holding the elastic on the back? Mine lasted only one trip. Managed to fix it with some zip ties but it would be a relatively easy thing to solve an obvious problem.

    Other than that I love the old version.

    1. Justin Simoni

      Yes. The loops are now made of a tough nylon webbing, rather than the previous fabric material. I’ve got my PB vest in front of me. If I try pulling HARD on the elastics, the webbing is holding fine – if I put my full force into it, I’ll rip the stitches that are holding the webbing onto the bag! (which I don’t want to do). So a great improvement. There’s so many external pockets now, you may find the need to even use the elastics will be less.

    2. Justin Simoni

      I should also mention (as it isn’t mentioned in the review) that there are a series of hooks on the sides of the pack, that you can loop the blue bungee chord around. These hooks are totally bomb proof, so if you want to cinch something down tight, utilize those.

  5. Peter Bakwin

    Very thorough review. Glad you like it! I’m surprised about the 5’8″, 155lb person not finding fit. I’m 5’8″ low-140s & size M fits me perfectly. Note also the lateral adjustment straps that allow the best to be cinched tighter.

    After yesterday I can say that the vest fits a 60mm X 8mm rope + harness… Fun!


  6. Bob

    Thanks for the informative review – you covered a lot of bases. I’ve been looking for a larger cap. pack and this was on my list. I have the SJ2 pack and this year bought the AK3 pack and find them to be a good size for my 50 mile events, but when I’m out in winter I need to carry more gear even for shorter outings (running, snowshoeing, xc, skijoring). One thing I did not catch in your review – the pack you say is not bouncy, but what about the bottles you stash in the larger front pockets? That was something I did not like about the SJ2 pack – the pockets were plenty large but because they were not stretchy, they did not snug down the contents. (I’m thinking about my softsided water bottles). I think the AJ3 is better on this. How is the PB3 for keeping pocket contents stable?

    thanks! Great photos too!

    1. Kristin Z

      The bottle pocket on the right has a pull cord to cinch it over top of the firm rim of the bottle, and when I use the UD 17-ish oz bottle it’s super secure. As the bottle empties and deflates, It doesn’t slosh and stays snugly in the pocket. This worked for a 16-20 oz store bought bottle of Coke also. The salomon soft flask also stays in the pocket even when tying shoes but cinching is helpful. The burrito pocket… With one soft bottle in it plus food, or one bottle plus phone (in Baggie) = no problem as you just unzip slightly and zip shut. With two soft bottles in the burrito pocket, you have to be more cognizant of how you layer them. I drink from this side first. I’ve only had one fall out if my torso went beyond horizontal (tying shoes w terrible body mechanics, picking up dropped poles). Ideally, if you need 3 bottles you could just use a bladder or stash a bottle in a rear stretchy pocket. This pack rocks for puffies, bagged microspikes, and wind pants plus food/fluids.

  7. Paul

    I like to take this pack out on longer road/trail combo runs (minimize time in luxury wheelchair) where I’ll be switching shoes. Big enough for some large/chunky size 12 trail shoes in the back and so much more.
    Love it.

  8. Terry Miller

    Just got around to reading this review, Kristin. Nice job. I have thought about getting this vest in the past, in fact I bought the very first iteration years ago but returned it immediately because it ate my shirt. So, the new sizing scheme had me optimistic, but the front pole storage might have me completely sold! Thanks for being so thorough

  9. C

    Can someone offer me reassurance on this vest before purchasing since it is a hefty price tag??? I am 5’9+. Approx 145-150lbs. And a 31 1/2 in lower rib measurement. I fall under the small or medium. I don’t want it too tight but after reading post on different sites – I’m concerned the medium will be too big. Suggestions? Ty very much.

    1. KristinZ

      I’d call UD themselves. I think they’d be more than happy to steer you in the right directions if there’s nowhere local you can try them on.

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