With Filestar you get 0 different skills for working productively with Unity Material (.mat) files.
About .Mat
Name
Unity Material
Extension
.mat
Format
Text
Category
Game
Developer
Unity Technologies
Description
A Unity material holds the shader and its texture, color and value settings for a game object. Unity saves it under .mat as YAML text (or, in projects with binary serialization, in Unity's own binary form); it is not a MATLAB data file.