Compressible easy to access and instantly dividable Peak Design Packing Cubes are functionally and aesthetically unmatched. A unique tear-away zipper lets you access contents quickly unlike standard packing cubes with U-zip openings. An internal divider lets you separate clean and dirty clothes and allows each compartment to expand/contract based on its contents. And an expansion/compression zip provides additional space or the ability to compress contents once packed. Outer shell is a beautiful self-healing 70D nylon/poly blend.