vs1 , a well-known creator in the VaM community who produces high-fidelity character looks, clothing, and textures.
The identifier refers to a specific content package for the sandbox simulator Virt-A-Mate (VaM) . This file is an "Add-On Package" (represented by the .var extension) created by the developer vs1 . Package Context & Details vs1.vs1_C074_Wet64.1.var
The 1.var at the end indicates this is the first version of this specific package. Guides Installing VAR packages from Patreon - Virt-A-Mate vs1 , a well-known creator in the VaM