weird model glitch

For some reason when I imported my model from blender to Unity it looked really weird and I had some glitch with viewing it. My model looks exactly how it should in blender. But it looks like this in Unity :

But this is how it looks in blender :

Normals are inverted.

In Blender, in edit mode, select the whole mesh, then under Shading/UV’s, select “Recalculate”.