Well basically it's a sweet backpack. The Messenger bag must get it's lineage from the name which makes sweet ass messenger bags. Big, no worries about fitting in a bag of groceries, has a few extra pockets and 2 straps in front for buckling up like a stormship trooper on Tattoine. Comfy for a long ride, almost waterproof and good aerodynamics fit it right against your back like an extra layer of backfat.

So first off, it's got plenty of straps to hold it snugly to you and good webbing management to keep all those straps from flapping around. That's sort of the minimum for me while biking, so it hits that. Tough construction as you might expect and lots of well-thought out pockets and loops without looking too "busy" if you know what I mean. Here's what really surprised me: It's got a TON of space. "12-inch laptop"?! This bag can hold about 3 20-inch laptops without flinching. I'm not sure where that description came from, but this puppy is way bigger than the caption makes it sound. Great all-in-one commuting/errands/study haunt bag.