I have an aero long halfbelt full panel back in thick goathide. It is my favorite jacket simply because it is the most comfortable to wear. I have aero in buffalo, horsehide and thick steerhide and the thickness is in that order with the thick steerhide being almost unwearable. I do not feel very safe riding in it(cafe racer) because it hampers movement so much. However, if I fell it would be the one I would want to have on. The aero horsehide is also very thick but at least I can see it breaking in eventually. The buffalo is like a very stiff heavier goat with the same texture.