The two-piece construction of this saddle pack for globe-trotting bikepackers is made up of a lightweight, waterproof dry bag with a buckle closure roll-top and air-release valve, and a harness with a bungee cord and gear loops on the top, and a reinforced base which makes loading and unloading quick and easy during short rest breaks, because the dry bag can be detached while the harness stays on the bike. The two buckle straps and two hook & loop straps adjust to a variety of frame sizes and tube diameters, including carbon bikes.