While assets can be used as any other 3D models, models in Try On Pack are also tuned to be used as an External Mesh property of a Body Mesh (following this guide). This page explains how to set cloth 3D model to track user's body in several easy steps
Using the Try on Pack
Step 1 - Import the asset from the Asset library by clicking on the Import button
Step 2 - In the Objects Panel press "+" and Select "Full Body Mesh"
Step 3 - In the Resources Panel locate Full Body Mesh Asset
Step 4 - In the Resources panel locate the 3d model mesh asset in the imported .fbx file hierarchy
Step 5 - Select Body Mesh Asset in the Resources Panel, and in the Inspector panel set the External Mesh field with the cloth mesh asset located in step 4. Set the Mesh Pose to A pose
Step 6 - That's it! You're done. No step 6 :) At this point you should have a cloth 3D mesh tracked to the user body
See detailed explanation of the additional settings in the External Mesh guide
Editing the 3D model in an external 3D Editor
If you want to bring this or a Body Mesh Reference models to the 3D editor right click on the fbx file in the resources panel and select Open in Finder/Explorer (save the project if you don't see this option in menu)
You now can bring this .fbx file to the 3D editor of your choice
Related Guides
To learn more take a look at the following guides: