Fancloth uses microscale motors and miniature fans to provide lift
Fancloth mesh size is affected by several factors; molecular motors can be made which are much smaller, but very small fans would be choked by atmospheric dust. Similarly, fancloth with mesh larger than 1.5mm create turbulent airflow and lose efficiency. Also important in fancloth use and design is the smart control system that allows the fancloth array to control each fan individually, ensuring smooth flight.
Fancloth can also be used in reverse to generate power as a form of wind turbine.
Image from Mysfytt
An Omnicraft in flight mode, using an array of fancloth wings
This material was first suggested by Information Age imagineer J. Storrs Hall, who also formed the original concept of Utility Fog.