Topeak Backloader X Pack. Features: Adventure ready saddle mounted removable drybag and holster system Includes waterproof carry bag with air release valve to keep gear dry and compact Bag easily slides in and out of holster without having to remove from bicycle 15L measures 19.7" (50cm) L x 5.9" (15cm) W x 6.3" (16cm) H 10L measures 23.6" (59.9cm) L x 7.1" (18cm) W x 7.9" (20.1cm) H Specs: Capacity:610 cu in (10L) Color:black Weight:-