Seatpack from the new ortlieb bikepacking range volume adjustable from 8l up to huge 165l makes this pack versatile and able to carry anything you may need on a bikepacking excursionfully waterproof with a well sealed dry bag style roll closure will keep your kit dry in all conditions with the added bonus of mudguard style protection in wet conditionspurge valve allows for compression of the bag contents keeping everything solid and tight on the trail and allowing you to make the most of th