Patagonia Black Hole® Travel CubesPatagonia's Black Hole Cubes add even more modular organization to our packing system. We have found that better organization in your luggage system provides for easier packing and locating what you need. Works great for any travel bag, but fit perfectly with the Black Hole Wheeled Duffel. Water resistant fabric with a recycled TPU coating MCL Cube has a roll top with a separate zip access lower compartment Code Model Capacity Color Price #33868 Large