The packing cube is one of those travel tools that seems trivial until you've used a good one, and the Pioneer Packing Cube is a serious rethink of the category. Built from a slippery parachute ripstop nylon that glides in and out of luggage without snagging, it fits neatly into any Pioneer backpack main compartment and stacks two per side in a standard roller, four total, bringing real organizational logic to the way you pack.