Patagonia Half Mass Bag


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With enough storage to hold the days gear and designed for the hard work of a bike messenger the Patagonia Half Mass Bag will keep you organized with smartly designed dividing sleeves and purposed pockets. A padded computer sleeve fits up to a 15-inch laptop and rises off the main compartment floor to reduce impacts. Made with polyurethane coated recycled polyester with a Deluge® DWR (durable water repellant) finish this attractive bag blocks out moisture to keep your important documents and electronics safe and dry on your morning bike commute. The main front flap has a water resistant reverse coil zippered pocket and with reflective piping and a webbing bike light mount you’ll stay visible when cycling at night. The broad shoulder strap is fully adjustable has a floating pad to keep you comfortable when toting a large load.


  • Material: 600 denier 100% recycled polyurethane coated polyester
  • Deluge® DWR (durable water repellant) finish
  • Lining: 200 denier polyurethane coated and DWR finished polyester
  • Adjustable shoulder strap with floating pad
  • 3 point adjustable stability strap and top carry handle
  • Reflective piping and webbing bike light mount for visibility
  • Drop in, mesh and padded electronics pockets
  • Water resistant reverse coil front flap zip pocket
  • Padded computer sleeve fits 15 in laptop
  • Interior drop pocket with hook and loop tab closure
  • Side water bottle pocket
  • Dimensions: 16 in x 13 in x 5 in
  • Volume: 20 liters
  • Weight: 1 lb 13 oz

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Review Summary

4.5 out of 5

17 Reviews

  • Build quality: 5
  • Great design: 4
  • Ease of use: 3
  • Lasts forever: 3

  • Bad design: 1
  • Low performance: 1
  • needs more interior pockets: 1
  • size may be too big: 1
Durability: 5 / 5
Quality: 5 / 5

17 Ratings & Reviews


Great laptop bag!
November 19, 2009

I bought this for my wife's new MacBook Pro and she loves it! I have a Half-Mass for every day and Critical-Mass for travel. These are well made and thought out. They would be 100% perfect with one or two more organizer pockets for small items.

Durability: 5 / 5
Quality: 5 / 5
from Denver, CO
35-44 yrs

Great bag!
August 05, 2011

bought this for my husband for use as a diaper bag. It works perfectly! it even has a bottle holder on the outside and tons of compartments inside for wallet, toys etc.

Pros: Great design, Lasts forever
Durability: 2 / 5
Quality: 3 / 5
from San Francisco, CA
35-44 yrs

An approximation of the real thing
December 08, 2011

I am generally a huge fan of Patagonia products, but was a little underwhelmed by this bag. The construction and sewing are good. However, compared to gear from Timbuk2, I found the materials thinner/less robust and the bag feels fairly flimsy. The bag is also a little too deep with limited pocket space and compartments. Also, the attached shoulder strap pad is very thin. I think people who actually commute by car will find this bag serviceable, but for those who actually ride a bike or take public transport to work can find better options for the same price.

Pros: nice styling, Cons: Bad design, Low performance
Durability: 4 / 5
Quality: 5 / 5
from Aspen, CO
25-34 yrs

great everyday multi-purpose bag
September 09, 2011

I have the critical mass and half mass, both of which are great. The half mass bag has room for my work stuff, after work hiking/outdoor gear, and my dog's stuff, all in a size that won't hurt my back carrying. If you have a lot of days belongings plus a laptop, I'd go for the critical mass bag, but if it's just a days things then the half mass is big enough. Both great purchases and definitely worth the money!

Pros: Great design, Build quality, Lasts forever

good for laptop
August 03, 2010

I got this bag to haul around my school books and laptop for work. It's roomy and fits all I need, but it's still comfortable to carry around all day. I got the brown and really like it, but would have liked more organizational spaces for smaller items.

Great bag, not-so-great color
October 28, 2009

This bag is well designed with many pockets. I got this for my wife who loves to organize, and she showed me where she was going to put all her stuff after we got the bag.

from Iowa

Great Bag
September 17, 2010

I went round and round on what bag to get and this size is perfect for school not too big- not too small.

Durability: 4 / 5
Quality: 4 / 5
from Boston
35-44 yrs

Sturdy, nice looking bag
December 18, 2012

Perfect for fitting a laptop, great for airline travel, lots of pockets and very secure closure love the green color excellent quality as always from patagonia

Pros: Build quality, Ease of use

Half Mass Bag
January 05, 2011

I ordered this as a gift for my husband and so far he really likes it...its the perfect size for him to bring to work. The only thing we would change is making it all one color without the silver reflective stripe across the front.

from Portland, OR

Great Buy
March 27, 2011

Great bag! Perfect size for biking around town, taking it to class, using it as a carry on, simple design makes it perfect for just about whatever you need.

excellent messenger/laptop bag!
August 30, 2010

I purchased the Half Mass bag in Fusion Sunset (color) and recently traveled with it as my carry-on, filled with my laptop and other stuff. This bag is the way it looks, the generous cushioning on the strap, the adjustability of the straps, and the optional waist/hip strap that can be used when the bag is extra heavy (in the airport between flights, it helps!). So far, I've found this bag to be quite durable, good-looking, and well worth the money. Way to go once again, Patagonia!


Great Bag
April 08, 2010

Well organized. Typical Patagonia quality


July 31, 2009

It's so easy to get attached to this beautiful, well-designed, environmentally friendly bag. It is very comfortable, (fabric so soft, and shoulder strap), and easy to access its pockets. It was a little too big for my needs. I exchanged it for the Mini Bag: I love it.

Durability: 5 / 5
Quality: 5 / 5

Nice bag, but please check size carefully
August 01, 2011

This bag is attractive, sturdy, and incredibly spacious. In fact, it was actually too spacious in my other reviewers have indicated, it's a BIG bag. I can't imagine how big the full-sized Patagonia bag is. It ended up being too big for my purposes so I had to return it. If you're looking for a bag that will carry a laptop and several books, this would be the right size, but for anyone else, this is not the right bag for you. The smaller version of this bag, the MiniMass, is absolutely tiny (like a purse). I wish Patagonia would make a "quarter mass" or something like that.

Durability: 5 / 5
Quality: 5 / 5
from Chicago, IL

Great for everything except small loads
August 19, 2011

This is a great bag for carrying everything you may need for the day. I use it to stuff in my workout clothes along with books and a laptop computer. Everything fits in comfortably. I even stuff in some groceries if I have to stop by the store on the way home. It has proven to be extremely durable as well. Another of the features I like about it is that it is "flexible" so that it can be stuffed into smaller places. It's simply not rigid like so many bags are. If you're looking for a decent sized bag, this is it.

Pros: Great design, Build quality, Lasts forever, Cons: size may be too big
Durability: 5 / 5
Quality: 5 / 5
from Philly, NY

Great Bag
December 11, 2011

I'm a big fan of Patagonia clothing and accessories, but unfortunately this bag wasn't for me. It was much larger and bulkier than expected, particularly for a petite woman. I would also prefer it to have a few more zip pockets since the interior is fairly cavernous. That said, the bag is well made and a good size for most people who are looking for something to use for the daily commute or occasional travel.

Pros: Build quality, Cons: needs more interior pockets
25-34 yrs

Great bag, a little too big
August 23, 2011

I was looking for a messenger bag for dental school that didn't look too hippie or too professional. The bag looks great, unfortunately just a little larger than I wanted. Definitely larger than the bags that carry a 15" notebook. Didn't get the chance to use it, but the materials and looks are great.

Pros: Great design, Great value

Also Available

Patagonia Half Mass Bag Photo

Bandana Blue, Black, Brilliant Green, Channel Blue, Classic Tan, Deep Mango, Deep Plum, Forest Glen, Grecian Blue, Larimar Blue, Lemon Lime, Light Balsamic, Magenta, Mission Olive, Narwhal Grey, Rossi Pink and Tuscan Olive.

Available sizes, while supplies last, include size and size one size: one size, .

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