I'm not sure. I own several pairs of Gramicci nylon shorts that are nearly identical in style and color. Several pairs have nylon mesh liners; the other pairs have no liner. My pair with Gramicci RN number 115852 has no liner. I recommend you ask Sierra Trading Post's customer service section to check for you. Alternatively, you could contact Gramicci's customer service section.
No, but the shorts are great.
These do not have a built in brief.