The Terrapin System is a holster-like mount with 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 drybag 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