Designed to provide a larger and more balanced load on multi-day adventures, when tackling steep climbs and technical trails and for every day riding and commuting, Frame Packs work well in combination with Apidura's other packs. Also great for commuting and every day riding. Pack dimensions have been optimized to fit a range of different frame sizes and geometries. Click here to compare dimensions among our different Frame Packs, or contact us if you are unsure of which size is most suitable for your bicycle. Constructed from high quality materials and optimized for durability and weight. Available in three sizes, to accommodate a range of cyclists. Please note that, while the body fabric of this pack is waterproof, due to the stitching process used to assemble the product, there is the possibility for water to enter the packs through the seams when exposed to a sustained rain. We recommend using an internal dry bag for contents that must remain absolutely dry (such as electronics).