Fastpack 15

The pack fits great and I love all the storage. I got the M/L and i'm 5'11 165lb, with 90cm measurement. The front zipper that you can access without undoing the roll top is genius. It's great for alpine climbs where a small pack that needs to stay in place is essential.

I only have two problems with it. One directional clips on the roll top can be a annoying at times and require you to look at them to latch. Also the back panel does not breath at all. On a short 6 mile run my back was soaked. A simple mesh or something is needed.

If those two things were fixed this pack would never leave my side.

Posted by James Rein on Aug 10th 2018

I own other running vests but they’re too fitted for non-run situations. This pack wears more casually along the lines of a daypack during commutes yet performes as well as the others for bounce-free run use.

Posted by Byrnes on Jul 12th 2018

I'm a smaller, women's frame (5'3" 110lbs). Although, within the small/medium size measurements, it does fit large on the shoulders. Small bounce although getting used to it. The ability to tighten the strap vertically would be helpful. But do like the fact that the two chest straps are fully slide-able. What impresses me is the weight distribution. I can pack it full and it doesn't feel like I am carrying much weight. The front pockets are great if bringing home my work shoes. And the two way zipper has come in handy. Haven't tried it yet in a downpour. Looking forward to commuting with it for the rest of the summer.

Posted by Jen on Jun 28th 2018

I'm an avid runner and often run to work so I need a pack roomier enough for clothes, lunch and sometimes shoes. This pack was the solution I was looking for. It fit great and roomy enough for the essentials. I love the external mesh pocket which fits a pair of shoes nicely. I also like the external zip feature which allows easy access to gear. I ordered size M and it fits great. Straps are very comfortable and adjustable. Very little bounce. If you need a running pack...look no further!

Posted by MC on Mar 8th 2018

Great little pack. Was torn between this and the fastpack 25. I wanted a pack I could run commute with, but also use for long trail runs and barebones overnighters. I think this pack is great for commuting and long trail runs, and could probably handle a barebones overnighter although I haven't tried yet. I will probably end up getting the 25 for the overnights because it would be very snug in using the 15.

Pros:

Lightweight and comfortable
swallows a lot of gear
Love the outside stretch pockets and the main compartment zipper
Phone fits great in the chest pocket
rides nice with very little bounce if any

Cons:

Hot on the back
buckles are a little finnicky sometimes

I would definitely recommend this pack to others and frequently do!

Posted by Dakota on Feb 8th 2018

I have a couple of the new UD running belts (analog, mono, stereo), as well as the bottles and soft flasks that come with them. I've been very happy with these products, which is why I thought the Fastpack 15 would be a great option for longer runs and commuting to the office.

The overall concept of the Fastpack 15 is great! I love the roll top design with zipper down the front, the large stretch mesh pockets up front and the design that does not incorporate a waist belt. Once I un-boxed the pack my thoughts quickly changed.

The overall shape of the pack is a perfect rectangle. There is no rounding or consideration of shape at the corners so the pack doesn't to a good job of sitting flush to the body near the shoulders and in the lower back. Additionally, the padding that is included is also a perfect, flat, rectangle, which causes the pack to sit off the back in some areas. I'm sure over time and use this would have molded to my back, maybe.

The material on the back is the same rip-stop material used across the entire bag. The padding mentioned above is solid with no consideration for airflow. The two combined, I assumed, would make for a very sweaty back in no time. Competitors packs generally have some kind of mesh material and perforated padding to aid with airflow and moisture, not here though.

The buckles used across the entire pack are unique to this pack, or UD overall. They only clip in one direction, and it's not overly easy to get them in the right direction, especially when doing it blind.

As bad as the pack sounds, the overall shopping experience from UD direct was even less amazing. The buyer pays shipping in both directions, assuming you make a return. On a pack this size, it's not cheap, maybe $10-15 shipping to you and $20+ to return. The bigger insult though is that to return it the bag needs it's tags intact. You don't even get a chance to really try the product to see if it would work, you just look at it, try it on and hope for the best.

I would seriously suggest not ordering from UD direct, but buy from a 3rd party like Backcountry.com or REI, their shipping and return policies are much more consumer friendly.

If you're really bent on buying one of their packs I would highly recommend finding one locally to try before you make the order. If you're open to other brands there are absolutely better options.

Posted by Steve on Dec 17th 2017

So far I've done two long day run/hikes with it, and I love it. It's super comfy and as long as the weight is balanced front and back it doesn't bounce or move too much. The front zipper fits my phone and a couple waffles, a soft flask in the other pocket, and lots of snacks in the small front pockets.

It's first trip was the Enchantments as a thru-run, so I had some extra warm clothes and my nice camera. Having the zipper open from the bottom is nice so I can get my camera quickly without unrolling the top. Trekking poles and water filter fit well in the outer pockets.

My only question to UD on design...why is the zipper not a waterproof/resistant type?

Posted by Lisa Wilson on Sep 12th 2017

I've only had a chance to do one short 20 mile run in the fastpack 15. I added enough weight to simulate an overnight trip along with a 70 oz hydration bladder.
the pack was comfortable to run with, it felt snug with little to no bounce. So far I only have 1 complaint. the hose for the hydration bladder only has on point to exit the pack which is directly behind the head. the causes the hose to rub on my neck which would have caused chaffing on a much longer run. I tried to route the hose differently but it wasn't right. Last night I had my wife make a hole on the right side of the pack and reinforced it with seaming material. Hopefully that will do the job. otherwise I think this is going to be a great pack.
I had her do the same to my 20/30 pack which I will be taking on a solo 150 fastpack trip next week.

Posted by Rich Flint on Aug 7th 2017

This is really a nice sized pack for an all day adventure; with stretch pockets it's very close to 20 liters

I had mine loaded with a little over 8 lbs (about 1/2 that in water) and took it out for 20-ish mile run in the mountains. Pack carries very nicely- no bounce or sway and it's very comfortable. The pockets are laid out nicely and easy to access. I was happy to see that my favorite water bottle, a repurposed Vitamin Water bottle) fits perfectly in bottle pouch. My iPhone 6 with a Lifeproof case fits perfectly on the opposite side. The flat compartment behind the phone holder is the perfect place to stash your map.

I really like the two big mesh pockets, they easily add 5 liters to the overall volume. I like the two way zipper to access the main compartment (you can also access via the roll top). I think this zipper should be a water resistant one however as the main pack material, Robic, is highly water resistant.

A few cons:
I don't like the new style buckles, they don't look any lighter than previous ones, but are difficult to close- almost have to be looking at them to get perfectly lined up.
The shoulder/harness straps need to be lengthened- when the pack is loaded (and a bladder used) I found that I was almost to the very end of the adjustment. This is with a M/L and I'm not overly large (~180 lbs with a 42-ish" chest. Someone larger could bump into problems. I like the double sliding sternum straps, but they could be improved in my opinion with one side being elastic webbing.

I'm planning on a bare bones overnighter with this pack and will report back with my impressions. While this pack probably wasn't designed with overnighters in mind, I think with the right selection of gear it will do the trick.

All in all, I very much like this pack!

Posted by Mike M on Jul 17th 2017