.SSS File Extension

Contains a variation of a skin style used by Stardock WindowBlinds, a program for customizing the Windows user interface; defines the appearance, positioning and other characteristics of the skin.

The default skin style has a .UIS extension, while alternative styles or "substyles" have an ".sss" file extension.

SSS files are also used by Stardock SkinStudio, a skin editor for WindowBlinds.