MoosePacks Seat Bag. Features: Mounts to the seat rails using a durable Voile Straps attachment that allows the bag to be compatible with most dropper posts Reflective zipper pull with YKK water-resistant zipper tape Made from 100% recycled polyester and 100% handmade in USA Third party online sales strictly prohibited by manufacturer Specs: Model:Seat Bag Capacity:45 Cu In (0.75L) Dimensions:14.6x10.1x5.1cm Color:Blue Weight:72g