These are Empty atom presets combined with clothing presets with a plugin (VAMStory Actions) that creates a UI to control the loading of presets and the state of individual clothes, eg: open/close a blouse. They are packaged as VARs so they go in the AddonsPackages folder.
Each quickdress VAR includes multiple clothing options. The thumbnail shown is just one of several choices in the VAR, some can have more than 10 clothes options. You can find instructions on how to load and use them in the quickdress presets page linked above.
Individual clothing presets will be removed from this website when available in a quickdress preset. If you do not want to use a quickdress preset you can still use the clothing presets inside the VARs.
YourVAMfolder/Custom/Atom/Person/Clothing/