Humanoid Mesh with white pixel around it

Hi guys!

We have an issue on our side with a mesh.

The mesh has whites pixels dots around it on black/dark background. It also looks more pixelised than expected.

The mesh has been made using zBrush.

We are pretty new with 3d so it could be a newb issue.

Thank you!

P.S : We are using the lastest version of unity.