On the other hand, the ultralow underwater−oil adhesion force results in a robust self-cleaning property. Therefore, with the superwetting and the underwater oleophobic self-cleaning property, these mem- branes are suitable for the separation of different oil/water mixtures. Moreover, the natural fabrics, not limited to cotton, bamboo fiber, and hemp fabrics, are common, commercially cheap, and environmentally friendly materials with flexible but robust mechanical properties, which make the fabric mem- branes a good candidate for oily wastewater separation, even under strong water flow. This work would also be helpful for the design and application of new underwater superoleophobic self-cleaning materials and related devices.