The only problem with commuting by bicycle (and it's a big one) is how it wrinkles and sometimes destroys your clothing. A bicycle commuter pannier can take away the downside of bicycle commuting and free your cyclist to commute and exercise at the same time. No longer will they worry about what's happening to their clothes (mud splashes, scrapes, etc.) or what to do with all their work paraphernalia; instead, they'll enjoy the pleasure and exhilaration of riding their bike to work.