This is a Fast train from Saint Petersburg to Kiev with increased level of service called a "Firmenny" train.
Both 1st and 2nd class cabins are available. 1st class consists of a cabin with a sleeping berth for 2 people. 2nd class consists of a cabin with a sleeping berth for 4 people.
Bed linen, light breakfast, tee, coffee are included.
The train also has a nice dining car that serves good meals. NOTE: This train goes through Belarus on its way, so you will need a Transit Visa to cross the Belarus territory. Russian train tickets on this train can be bought only in person on the train station.