Free 2-Day Shipping on Orders Over $50* - Limited Time Only


From a two-wheeled commutes to a two-footed runs between gates.

From school to Spain, from work to Winnemucca, from urban to suburban, you need a bag that can handle its fair share of activities and haul stuff so you won't ever be without. The Patagonia Half Mass Messenger Bag is ideally sized for a day's worth of gear. The interior padded sleeve, which is raised off the ground to protect most 15-inch laptops, secures with a buckle and strap. Also under the main flap, there are tons of options for organization, including a drop pocket, a mesh pocket and three slots for pens. The fully adjustable shoulder strap is equipped with a floating pad for comfort, and the tuck-away stability strap helps secure your load when you're pedaling or walking in high-traffic areas.

  • Fully adjustable shoulder strap with floating pad
  • Top-side carrying handle
  • Main flap opens to largest compartment
  • Laptop compatible up to 15 inches
  • Front reflective panel and bike light lash point

Share your thoughts

What do you think of the

Patagonia Half Mass Messenger Bag - 915cu in

? Share a...

Write a review

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

    Add a:
  • Share a photo
  • Share a video


Only jpg, jpeg, png, gif or bmp files please.

Submit Cancel
Now review from the App. Download

Here's what others have to say...

5 5

Great bag

  • Familiarity: I've used it several times

Was a little hesitant reading the review about the strap pad, but I have no idea what that reviewer was talking about.

To start. The buckle slides super easily into the pad as pictured. I'm guessing that's what Patagonia had planned in designing it. So anyone that was hesitant due to that review, please ignore it.

The material thickness is very similar to my north face borealis pack. The buckles look exactaly the same too. Good quality pack buckles.

The extra strap kept it secure when I took my motorcycle to work today. I take the interstate so speeds are 70+ and there was no problem with it getting out of control.

Overall a great pack that expands for plenty of room.

Great bag
3 5

Small design flaws in otherwise good bag

  • Familiarity: I've used it several times

I was looking to replace a slightly worn Timbuk2 bag that lacked a good water bottle pocket. Unfortunately, small design flaws made me decide to return this Patagonia bag. First, the good: decent amount of pockets to hold and organize all my stuff, the bag was nicely lightweight, and it had a nice tall side pocket perfect for a water bottle (just what I was looking for). The not so good: fabric seemed a little thin, not sure how it will hold up over years of use, the plastic buckles seem thin and not very sturdy, the bag doesn't sit upright but rather leans and falls over to one side. The really bad - the shoulder strap adjustment buckle is on the wrong side of the shoulder strap pad (see picture). In order to lengthen the shoulder strap, you pull and thread the strap through the black adjustment buckle (same design as most bags). There is a nice pad on the shoulder strap so that it distributes and cushions your shoulder as you hang your bag on your shoulder. Unfortunately, as you adjust and lengthen the shoulder strap, it pushes the pad onto the progressively shorter side of the buckle so that the pad can't sit on your shoulder but rather sits in front or behind. The only way to correct this is to try to push the adjustment buckle through the pad (the pad doesn't come off), and the space where the strap goes through the pad is too narrow to accomplish this. The adjustment buckle should have been on the other side of the pad so that as the strap is lengthened, the pad is on the progressively longer side and can slide around to sit on top of your shoulder and cushion the shoulder. Hopefully, looking at the picture will clear up my explanation. Anyway, it's a deal breaker. I could try to force the adjustment buckle through the pad, but this could mess up the pad. It's too bad since it's otherwise a pretty decent bag.

Small design flaws in otherwise good bag
5 5

Ideal Computer Shoulder Bag or Weekender

  • Familiarity: I've put it through the wringer

We've had one of these bags for a long time and it's perfect for bringing along our laptop when needed. Comfortable shoulder strap, many useful pockets, room for some clothes, and a protective inner section for the computer make this an all-in-one weekend bag for us.

5 5

love it!

  • Familiarity: I've used it several times

I use it as my daily diaper bag and love it! Quick to access and wear it over my shoulder/back so that I can still easily carry kids on my hips. With 2 kids under the age of 2, there is lots of stuff to tote around and this has plenty of room for the necessities but not enough room to shove lots of extras that I don't really need! Going on vacation in a couple weeks and I'm so glad we got this before the trip because it will be much easier to keep with us as we tour DC than a traditional over-the-shoulder diaper bag.

2 5


I have been using a Half Mass for the last 4 years on daily commutes, trips, and general around town excursions. It was starting to get a little ratty, so i wanted to grab a new one.

I was really disappointed when I got this version, however. It seems like Patagonia stripped the whole bag down to save costs or something. It has way fewer pockets and places to stow stuff, the laptop sleeve is flimsy and doesn't close, the strap adjustment is a single plastic ring, instead of the old quick release. Overall the bag just feels cheap now. It's too bad, the old bag was the perfect commuter, but now i'm going to have to find something else to replace it.

4 5

Pretty good

  • Familiarity: I've put it through the wringer

I've been using this bag for a few months on a daily bike commute. It's nice and waterproof, and looks pretty stylish. It's the perfect size for a laptop, notebook, even a pair of shoes. I also like how the bag size is adjustable for when I need to fit bigger things in.

But I don't like how low it sits on my back when I ride. I'm a smaller guy (5'8, 150), and even after adjusting the straps it's a pain to get it to stay up off the lowest part of my back. I also don't like the organizational pockets all that much. They're tough to get into when you've got stuff in the bag.

But I've taken a few spills in it and it's held up pretty well.

4 5

Tough but still looks professional

  • Familiarity: I've put it through the wringer

What a great upgrade. After years of using an old hemp bag, having this well constructed weatherproof bag has been a joy. The shoulder strap is well padded and comfy and having the water bottle pouch on the outside is a great addition for easy access on the move. The adjustment for the shoulder strap is a bit annoying as it can be hard to get the pad over the bulky plastic adjustment piece (my only complaint).

Patagonia Half Mass video review

Ned from Patagonia talks through the newly redesigned Half Mass messenger bag