Some of the main line trains and international trains have sleepers. Sleepers are called “yatakli” in Turkish.
Each sleeper cabin has two beds, washbasin, air conditioner and electric socket
The compartment has to be reserved once. If one passenger reserves, a surcharge is applied.
Fare for sleepers in domestic routes is TL 70-90 for single bed (€ 15-20), TL 50-60/person (€ 12-15) for double bed in addition to train fare (as of January 2018).
Trains with sleeper cars are (as of January 2018):