What is 2S class in Indian Railways?
2S is second seating class of Indian Railways and is Non AC class. To know more on this class check Trainman. Link- Indian Railway Classes: AC (1A,2A,3A), Sleeper (SL) & Seating (CC, 2S) on Trainman
Second seating (2S) is chair car and does not have air conditioning. It can be both reserved or unreserved. It is highly recommended never to travel in unreserved second seating as it is crowded and dirty.
Reserved second seating
Unreserved second seating
Great to see this here