My school/daily carry backpack, the Errant from Boundary Supply.This thing seems to be built to be thrown out of an airplane, into an active volcano, and retrieved after the volcano becomes dormant several thousand years later. Jokes aside, this is a serious bag. It isn't strictly a man purse, but it has a side handle so it can maybe pass for a briefcase if you tie the straps up. Very rugged, water and abrasion resistant (genuine?) hypalon outers with very nice nylon to go along with it. Plenty of pockets and organization for those bits and bobs, holds my laptop, school papers, hoodies, bike lock and such nicely with room to spare for other stuff. It's got lots of quality-of-life features and good (albeit pricey) accessories that the manufacturer sells to upgrade it if you so desire. Been using it for several months now with no real complaints and basically no signs of wear. Highly recommend as an EDC, school or work bag.