I bike 4 miles everyday to and from work, often with a laptop and always with a lunch. I've replaced my backpack with a timbuk2 bag 6 years ago and haven't look

I bike 4 miles everyday to and from work, often with a laptop and always with a lunch. I've replaced my backpack with a timbuk2 bag 6 years ago and haven't looked back. I bike in pouring rain and snow and it still looks great. The cross strap evens out the load on my shoulder, works better than backpacks that gave me shoulder pain. Lots of great pockets for easy access. I doubt I'll need to replace mine but if I lost it I'd replace in a heartbeat.