Terrapin System Seat BagDescription The Terrapin System is a modular, waterproof seat pack with a removable drybag that allows for easy packing off the bike. Approaching nearly a decade since it's first design, this generation of Terrapin has improvements on the stability, ease of use, and durability of the bag. The Terrapin System features Revelate's exclusive Indie Rail attachment system. A progression from conventional bikepacking bag mounts where the rail straps are