If the dressed avatar includes shoes, a saved snapshot also includes the shoes. For example, you can have multiple snapshots, each with its own shoes.
For more information, expand the following according to what version of software you are using:
If you share a BW file with shoes that has been saved as Garment + Avatars & Accessories (*.bw), this allows the other user to view and adjust the shoes. If a user opens such a BW file containing shoes, the shoes are automatically added to the user’s closet.
For more information about the file format, refer to Opening and Saving a BW File.
If you share a VSP file that includes shoes with another user, this allows the other user to view and adjust the shoes. Sharing a VSP file is how you share shoes already fitted to an avatar. If a user opens or imports a VSP file containing shoes, the shoes are automatically added to the user’s closet.