What is a Sleeper Class in Train? Sleeper Class in trains refers to the reserved coaches in all long-journey trains that are not air-conditioned. The coaches consist of lights, fans, and charging points. Sleeper coaches are the most affordable reservation train tickets available on IRCTC trains. You can't make new bookings, modify or cancel existing bookings online. If you have an existing booking and need assistance, please contact our customer care team. Seat Map or Coach Layout of Class Sleeper Class in Indian Railways by etrain.info When someone asks, “What is SL in train?”, “SL means in train?” or “SL full form in train”, it means the legendary Sleeper Class. If Indian Railways had a backbone, this would be it.
