i use a sump pump hose, its really cheap and doesnt collapse, good for dust but attached to my router table clogs in minutes, thats because its not smooth inside, solution for that was to attach a rigid pipe down to a bucket and then attach the vacuum to that, with time i modified to attach more than one vacuum to it for more suction or to automatically alternate in case they are overheating when i do some quick and dirty vacuumbagging.
ROS that have attachments to pick up the dust usually use a perforated sandpaper so if you cut your own pieces out of big sheets and dont punch out the holes suction gets noticeably less. For the others that are older and/or dont have the tube ready (the dusty by design ones) its failry easy to make a skirt to attach to it cut out from a plastic container of the right size, the hose its connected to the skirt and the dust its gone, but, since we all have fiberglass at hand, its almost easier to stick some foam around the tool, shape it and then use it as mold to craft your own skirt, the result is sturdy and rugged enough to last a long time.