>>2719825What it feels like can vary dramatically depending on what's used to give the skirt its volume. There are two common types of underskirts and I've tried both.
To get a shape similar to your image, you'd almost certainly need a crinoline with hoops. Those are extremely light, rarely weighing more than a couple of pounds which you'll barely even notice on top of a corset. They're not at all difficult to walk in either since the hoops should keep the skirt rigid enough to prevent it from even touching your legs. It feels a lot like you're not wearing a bottom at all. You only run into problems when either sitting down or navigating spaces that aren't as wide as the skirt. But the hoops are very flexible and can easily be scrunched together to get through tight spots. Sitting isn't a huge problem either given the proper technique and type of chair.
Tulle underskirts are very different. Most don't provide nearly as much volume as a hoop skirt and aren't as appealing to me for that reason. The ones that do can be extremely heavy. I saw one featured on My Big Fat Gypsy Wedding that supposedly weighed about 200 pounds. The woman was unable to walk without assistants to help carry portions of the skirt. But that's a very rare and extreme case. Most tulle petticoats simply don't attempt to create the same sort of fullness that a hoop skirt does. They can be more difficult to walk in since you may have to worry about tripping over the skirt, but you can sit down normally since the tulle doesn't hold its shape as rigidly as hoops.
Hopefully that gives you enough terms to find other resources that might be more oriented toward whatever your specific interest is.
