The Terrapin System is a holster-like mount with an integrated RF welded drybag. The load can be quickly removed from the bike for packing/unpacking. With Indie-Rail, each saddle rail is cinched down hard to the sides of the bag, virtually eliminating side-to-side bag sway without the need for external hardware. - Indie-Rail attachment system and active camming hardware - Super stable without added hardware - Radio frequency welded dry bag with air purge valve - Protective external plastic bottom frame sheet - Aluminum hardware at high stress points - Composite internal top frame sheet - Hypalon slots on drybag for rear light attachment - Foam-stiffened side panels with fiberglass compression stays