To add this product to blenders asset library, open Blender 3.0 and up. 
Go to edit, preferences, and scroll down to Filepaths, add a new selection. Name it what you like. 
You can then drag and drop the entire Unzipped folder named clothing in the directory. 
Save preference setting and exit and restart blender. 
Now open the asset panel, look for the file you titled for the clothing and select it. 
Use the append model and drag and drop them right into your screen.