Blackburn outpost top tube bagwith its large 0.5 litre capacity and waterproof material, the outpost top tube bag will comfortably hold and protect your camera or other key cycling items when youre taking on an adventure ride on your gravel bike or mountain bike mtb'. '.strtoupper('s')imple to install with its three velcro strips, blackburn has included extra features such as an external mesh pocket and even a zipped identification and cash pocket.fully adjustable interiorthe adjustable organiser allows you to customise the internals of the bag so you can get the perfect fit for all the items you are carrying'. '.strtoupper('i')t is perfect for when out on the road or trail when you want your camera close should you want to stop and take a quick snap'. '.strtoupper('i')t also has ample storage space for snacks, journey essentials and can be adjusted to carry just about anything for your bikepacking adventure.features material 70d nylon 4mm ripstop dimensions 235x80x120mm capacity 0.5l water resistant yes, water resistant treatment and backing mount type velcro straps spacious interior with adjustable organizer exterior mesh pocket zippered i.d'. '.strtoupper('a')nd cash pocket top tube straps adjust to mount quickly on almost any bike weight 267g 9.44 ozbuy blackburn accessories from chain reaction cycles, the world's largest online bike store.