Ultralight Packing Cubes - Ultimate Packer 7pc Set Green. Theres a lot that didnt go into these Ultralight Packing Cubes – like as much weight and bulk as possible. Start with crazy strong lightweight siliconized Cordura® Nylon, add a new ultra-light zipper from YKK®, color-matched easy-to-grab corded zipper pulls that dont sacrifice ease-of-use, and a full mesh top panel for complete visibility and ventilation. Lastly, we invented a totally new patent-pending spring-loaded mini framed design that holds its shape while youre filling them up with all of your life essentials. Its time to get packing!