The Patagonia Critical Mass Review, Heavy on Critical, Light on Mass
The critical mass bag is the large (22L) and redesigned version of Patagonia’s half mass bag (15L), other than size, the big difference is that the new critical mass bag has two shoulder straps (like a regular backpack). This bag is great for those who want to transport gear in style, and makes it a great choice for those who do not want to want to lug around a briefcase for work. You can fit all your work stuff in here and more. This bag is very roomy.
This bag is very light, weighing in at under a kilogram or 2 lbs, given the amount of goods you can carry in it. This is a great commuter bag if you need a really big bag – great commuter bags are hard to find, but this one comes very close. It is a great size for carrying up to 17″ latptop, several books, jacket, extra layers, lunch and coffee thermos and mug, not to mention all your power cord and other office stuff. Very comfortable to wear. Handy laptop padded sleeve, tons of little storage pockets for odds and ends including two exterior mesh pockets for your water bottles, shoes, or sweaty post workout clothes .