Sold as a pair. Where will your journey take you? Anywhere with the Ponderosa Panniers. These bike bags are ready for anything. Whether it's sunshine or rain, your gear stays dry and protected in these 100% waterproof bags made from TPU fabric with welded seams and Hypalon reinforcements. The panniers are secured to the top of the rack with two large Velcro straps and utilize the lower compression strap to be fastened at the bottom of the rack as well. This ensures that the bags do not sway back and forth, no matter how bumpy the ride gets. Since the straps used to attach bags often represent a weak point, all compression straps on the Ponderosa bags are fully replaceable, making them excellent for daily use and significantly extending the lifespan of the bags.