Blender

1) Unzip the .zip file using any zip file archiver and compressor (e.g. 7-Zip, Hamster ZIP Archiver Archiver).

2) Start Blender and open the unpacked file named Male_Body_01.blend.

Additional resources: 

1) "Final_texture_body_man" 

Unzip "Final_texture_body_man". All textures with a resolution of 4k, 2k, 1k are stored here... 

- Three different eye color textures!

- Two textures of Skin with hair on your face! 

- Base_Color, Ambient_occlusion, Height, Normal_OpenGL, Roughness, Specular,Scaterring and others;

2) fbx, obj - formats for exporting the model to other programs or game engines.

Demo scene with customized materials in Marmoset Toolbag 3

 1) "Marmoset Toolbag 3_scene"; 

Unzip" Marmoset Toolbag 3_scene" and open the program Marmoset Toolbag 3. Start the scene "demo_01";

All materials and textures are configured in the scene for demo rendering or animation export.You can see the purpose of textures and the correct configuration of materials.