Outlier is releasing an experimental update of its Dyneema Composite Ultrahigh Rolltop with a larger version called the Bigroll. The new bag has 20% more space and features a new Fidlock/Biothane roll closure system that can be closed by rolling the top or as a flap to adjust it to the size you require. There are also double Fidlocks on both sides and dual compression straps for increased comfort no matter how big (or small) your haul is). 

$495, outlier.nyc