Good Backpacks for Commuting?

[KnottedYet]

I use one of my Ortlieb panniers on a backpack adaptor... and it's ridiculously expensive. (it was a midlife crisis purchase ) On the bike it's a pannier, on bus-riding days it's a backpack.

Check REI for waterproof backpacks. They have some nifty ones. Seattle Sports has some very nice and reasonably priced and really waterproof backpacks called "AquaKnot". http://store.seattlesportsco.com/pro...&idproduct=621 These guys make bags for rafting and kayaking, but the backpacks look pretty wearable. I use one of their drybags when I kayak, and it really does keep things dry. They have a full line of bike panniers/bags, too.

Delta makes a pannier/backpack adaptor set which is much cheaper than the Ortlieb version. (the Delta pannier is kind of small, though) Similar rubberized waterproof fabric, but not quite as heavy as the Ortliebs.