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For you, commuting and travel isn't a some new fad that lasts through a summer of high gas prices. Instead of owning a car, you rely on good ol' public trans, your trusty steed and her many spokes, and this Patagonia Critical Mass Bag to comfortably haul work and travel necessities around town.

  • Reflective piping on the front flap and removable shoulder strap sleeve enhance your visibility to motorists
  • Large exterior zip and multiple internal slot and zip pockets offer tons of organization for smaller items
  • Large capacity cargo area provides ample storage for a variety of different uses
  • Detachable cross-body strap secures bag in place while you ride, run, or skate
  • Holds up to 17-inch laptop in suspended, padded pocket
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Best Bag Eva

  • Familiarity:I've put it through the wringer

I'm a medium sized lady and I bought this bag for superficial reasons. I don't like the women's colors at all. However, for non-superficial reasons this bag turned out great. I am a teacher and I ride my bike to work every day. It never slides around. There's a pocket for my water bottle and one inside for my thermos. Also, the laptop compartment is really nice for protecting important stuff. One of the main reasons I also like this bag is because it has a front pocket for things you have to fish out quickly. A lot of other bags don't for some reason. Also, there are plenty of little pockets on the inside. As for the fit, it's probably a little big, but I don't notice it at all. The chest strap is really nice for when I have to load my bag down with books and stuff. I have even gone on an all day hike with this bag in a pinch and it turned out fine. So, overall, great bag. It goes everywhere with me. No complaints.

Patagonia Critical Mass Bag

    I got this bag for my daily bicycle commute, which is 9 miles each way. I had previously been using a traditional backpack. What a change this has been! The bag sits perfectly and can barely be felt, in comparison to my old bulky bag. I love all the room I have for my change of clothes, lunch, and odds and ends I use every day. I would recommend this bag to anyone who is looking for a comfortable everyday bag.

    10+ Year Commuter in LA - Awesome Bag!

      I commute to and from work 5 days a week and have for the last 10+ years here in Los Angeles. From one side of the city to the other – On busses and trains. Twice a day. I have had many bags over the years, my last being a North Face tri-fold. I replace them each year. This Patagonia bag replaced the North Face bag. My commuter bag has to be multipurpose, rugged and durable as it serves as both my commuter bag and BOB bag (bug out bag). This Patagonia bag can not only sustain my daily activities, it also stores a complete contingency of items useful in the event of a crisis or emergency. In Los Angeles, the only real worry is an earthquake. This bag is so big that it holds my daily everyday items such as pens, papers, laptop, keys, gadgets, etc. and so much more. I am also a ham radio operator. I have two handheld radios in this bag and antennas. It also stores my rain gear, medical supplies, security, communications, water, shelter – basically everything I would need to be able to make it home on foot in the event of an emergency. So yeah, this bag is BIG alright. It is so big that when I first started using it, it took me some time to get used the size. It doesn't look like it can hold all of those things I just listed and there is a lot I did not list when you get it, but it sure does and then you realize how big it really is. It’s all about the packing. In the beginning before I got used to it, there were times when I would go looking for something I knew was in there, but couldn't find when in fact it was in there all the time. I love it. Get one! You won't be disappointed.

      10+ Year Commuter in LA - Awesome Bag!

      It works... well

      • Familiarity:I've put it through the wringer

      I use this bag for school, and also work. It can hold my 15.6" Thinkpad no problem, which is the reason why I made the purchase (had to move on from my Patagonia Daily Grind - couldn't fit my massive computer). The bag is big enough to hold a lot of my books, or gear for when I head to the climbing wall. The water bottle holder is great, and provides easy access. I don't use all the pockets internally, but they serve useful purposes. If I could change anything, the shoulder strap pad is not always the easiest to adjust (gets stuck on part of the strap adjustment). Overall, I'm happy with the bag.

      Big Enough for Everything

      • Familiarity:I've used it several times

      This bag holds my laptop, binder, 2 textbooks, kindle, lunch, snack, water bottle, and a jacket. It seems to be a bottomless hole, but everything stays accessible! The strap is wide and well cushioned, so its always comfortable. If you cant find a bag to hold the sheer amount of crap you need on a daily basis - this is the bag for you!

      A convert

        I was not sure if I wanted this ba or the half mass but I'm a college student and I have a lot of books I have to take so I went with the bigger one. Well I open up the box and it was definitely big. It was huge at first I thought it was to bi but you can synch it down. I love it it looks good it dose not hurt when you fill it up. It's an all around good bag

        Great bag ....stop looking.

          Great bag for the HUGE new 15" wide laptop they issued me here at work. I had a DaKine backpack but the new laptop would not fit so I had to upgrade. I am very pleased with the functionality of this bag. Lots of good adjustable webbing/straps with quick release buckles, things can be snugged up nicely. There are two internal storage areas, one fits the laptop and has an adjustable strap & buckle that holds it in place tightly. The other main compartment has plenty of room for all kinds of stuff including lots of side pockets that can hold and organize all the little things you need. The shoulder strap is comfortable and well made, it has an extra strap that will go around your waist to keep the bag tied to your body if you were cruising around on your bike (detachable cross-body strap). It has a water bottle holder on the side. Very durable fabric that will last, plus I chose the black color which shows little dirt yet looks professional. I used this traveling recently, it worked great as a carry-on while flying. Fit under the seat no problem. Patagonia made a functional, durable product that is made to last and meets the demands of today's mobile business world.

          FINALLY Found a Replacement

            We have this ratty old backpack that was busting at the seams. Tried many different bags from North Face, Timbuk2, Marmot, etc. Nothing was working. We tried this and it fit everything. We FINALLY FOUND A NEW DIAPER BAG! Quite a lot of suspense there, eh? I actually liked it so much I bought another to use for work/computer bag. Really solid construction, great pocket placement, not heavy in itself. Not waterproof, but great water resistance. This is the one. FINALLY.

            great bag. perfect size.

              my previous bag after many years of service tragically lost it's life to my dog when I went mountain biking and didn't take her along.

              bag is big enough to fit everything i need for a day: laptop, notebook, papers, lunch, and workout gear, and holds it comfortably. the bag isn't bulky when it's empty, like my other one was. internal storage and organizer is great. i find that bag is easy to get into when i need something quick.

              the reflective elements offer great visibility. i also really like the attachments for my blinky lights.

              Is this this years model or last years...

              Is this this years model or last years model. I have heard they made some changes that people aren't happy about. I have a half mass from about 6 years ago that I love, it's just too small now.