Patagonia Backpack! originally from the early 2000's used as a daily office / laptop bag and to travel with.  Rock solid and basically bullet proof.  will keep your laptop safe and even includes an isolated water proof / resistant pouch if you had a wet towel or something you need to keep apart from your important dry goods and snacks.  Let's talk about SNACKS.  This bad boy will keep you well fed with your favorite treats, there is no shortage of compartments.  You can keep it gorpcore and stuff this thing full of granola, or put a tub of red vines in there and head to your favorite National Park.  Heading out for some passport stamps? you are in luck, there is a zippered passport pocket inside.  Adopt an alternate identity and flee the country with confidence.  This bag has EVERYTHING!!!  Even a microfiber sunglasses compartment on the top of the bag. A water bottle holder.  2 separate interior compartments, pockets within those compartments.... it is like a literal BlackHole (not to be confused with the BlackHole name of another Patagonia Bag).  All the zippers are in perfect shape, the only thing to note is the small doodads that fits to the end of the mini cords have worn.  This would be approximately a 28L-30L size bag, though I was unable to look up the Style# from the page, but you may be able to do better detective work then I can.  No washing or care instructions are provided by Patagonia, but I will leave this to the buyer's best judgment.