These ultralight packing half cubes have a handy feature that allows them to compress their contents saving more space in your pack.
First you pack the cube as normal and then when done close the external zipper which squeezes the cube down into a smaller shape. The lightweight yet strong nylon is not completely opaque so you can see the contents inside helping you find your gear easily.
Small Cube: 25.5 x 18 x 3 cm (3 litres compressed)
Medium Cube: 36 x 25.5 x 3 cm (7.5 litres compressed)