Topeak MTX rear rack trunk bag. Has 2 pannier bags that fold out if needed.Topeak adaptor that comes with the bag allows ANY rear rack to accommodate this bag. MTX means quick release,so you can take the bag with you after locking up your bike.All zippers work. No rips or stains. Always stored inside on the bike, so never wet! Cash only. No cash apps. No shipping. Pick up in Lynden. The bag alone on Amazon is $119! Great deal!