ACEPAC Drop Post MKIII saddle pack for bikepacking (virtually identical to Rockgeist Gondola). 7L capacity, black nylon. I've got other ACEPAC bags and they're all incredibly well made and, reliably/reassuringly waterproof due to the independent liner (removable). Bought it for carrying waterproofs, tools and snacks on my wife's bike but ultimately she's never used it.
