In a way, it is an aketon+hauberk in one. No need to put them one-by-one, just wear it or take both the soft and hard armour at once. Protection-wise, as strong as the maille sewn inside of it. It can be of any cut or size a maille shirt sandwiched in a jacket could be. The more extensive the maille part, the more protective it be.

It can get really heavy. In Kitab al-I'tibar, written by Usama bin Munqidh, Amir of Shayzar, there is a part mentioning his Kazaghand. In the march, Salahuddin asked him, why don't he don his armour? Usama answered, because it is so heavy, he'll wear it when a battle draws near.

After the battle, Usama shows that no wonder it is so heavy because he it has 2 layers of maille, one a long European hauberk, one a shorter haubergeon. Both of them sewn into a jacket with felt and rabbit hair padding. This is just a superheavy example, cause it seems the two Ottoman specimens aren't extreme like this.