I be a daily bicycle\/rollerblade commuter . I usually overstuff this bag . it fit comfortably and securely , especially with the ergonomic\/adjustable shoulder and waist strap . I live in the Seattle area , so I really appreciate the weather proofing . lot of compartment to separate my personal and professional stuff . great detail . I like the reflective piping and the ext. flap loop to attach my tail light . it would be nice to have a carry handle-brief case like . otherwise , well-made , practical , great value-outstanding . I almost look like a real messenger .