Seattle Sports knows about keeping your commuting or touring stuff dry, and their Rain Freighter is nicknamed "The Big Daddy of Panniers" for a reason. With 21 massive liters of storage, rugged, PVC-free (as in non-toxic) nylon material, and radio frequency welded seams, this 3-fold pannier holds a whole lot. Add in a handy 2.5 liter weatherproof exterior zipper pocket, easy on/off hooks when you want to grab and dash, and reflective patches to keep you safe from motorists, and you've got one serious friend for commuters or tourers.
Item No. » SS-RNFRTR