This ingeniously designed travel backpack comes with a detachable packing cube at the bottom, allowing you to separate shoes or any other items from the main compartment. With a suitcase-style opening to the main compartment, a cushioned laptop sleeve, and an over-the-trolley sleeve, the Carry Cube Backpack is perfect for long weekends, or as an under-seat bag for all of your travels. Details Fits laptops up to 15 Comes with a detachable packing cube at the bottom, allowing you to separate your shoes (or any items) from the main compartment. Use it with the packing cube attached for travel or remove it for everyday adventures. Made with durable Crinkle Oxford Nylon and a waterproof base built to withstand the wear and tear of travel. TSA-friendly and designed to fit under the seat in front of you, Main compartment has a suitcase-style opening, giving you easy access to your belongings, and clothing can be compressed with the interior mesh zippered pocket. Also includes two inner mesh zippered pockets, and two exterior zippered pockets. The exterior includes a cushioned laptop pocket and a nicely padded trolley sleeve for added comfort when carrying it on your back or when traveling with a suitcase. Specifications Dimensions: 18.5"x12.5"x6.5" including cube. Cube Dims: 12.5"x6.5"x3.5". Weighs 2 lbs . Fits laptops up to 15" Volume of Main Compartment: 14.7 litres Volume of Cube: 4.66 Material: Nylon with poly lining. Nylon zippers. Care instructions: Wipe clean with damp cloth