Blackburn: Keys, check. wallet, check. energy bars, check. hydration bladder, check. The Outpost frame bag is the perfect companion for your all day pleasure ride or your week-long adventure ride. An expandable bottom compartment accommodates more mission critical gear.• Expands to fit a wide variety of frames and sizes• Simple to install and remove• Highly water resistant• Interior organization and exterior slip pockets• Includes hydration tube port
