Pack-It Specter 2-Piece Compression Cube Set Strobe Green. Pack shirts, skirts, dresses, undergarments, and more in this Eagle Creek Pack-It Specter compression cube set. When you want to travel light, these packing organizers are the best bet. Made of silnylon ripstop, these suitcase packing cubes are water-repellent and extremely lightweight, helping save space. Their quick grab handles make it easy to carry them around. Featuring compression zippers, these cubes can be squished to create more space in your luggage trolleys.