There are three major types of train cars at the overnight trains - 1st class, 2nd class and 3rd class.
All of them are equipped with bathrooms which have a WC and water basin.
Some of the trains have delux cabins with en-suite WC and shower.
Due to the sanitary reasons, bathrooms get closed in approximately 30 minutes before arrival
to the destination and on major stops on the route.
Modern Russian train cars are equipped with bio-toilets which do not get closed.
Most of the modern cars are air-conditioned.

Train tickets for domestic trains can be purchased not earlier than 45 days before departure.
For international trains it is 40-60 days.
This can be explained by changes in a timetable and prices, taking place from time to time.
To purchase a ticket, information about the name and passport number (the number of a certificate of birth)
of a passenger is needed. Tickets can be purchased by passengers themselves
(then, passport itself is to be presented in most cases) at Russian Railways ticket offices,
usually situated at railway stations, or with the help of train tickets and travel agencies.
It can be difficult to get a ticket close to the departure date, especially in high season.
Most of the train tickets can be purchased online at the Russian Railways website or
websites of the ticket agencies.
In a ticket, information about a passenger and his route is provided.
Travelling by a Russian train

Boarding on a train usually starts 30 minutes prior to departure. At the entrance to a car, the train attendant checks tickets and passports.
Depending on terms of your ticket, you can have your bedsheets and meals prepaid or not.
In the first class cars in domestic trains they are usually included,
and you will find them in your compartment. If not, you can pay to the train attendant.
Train attendants also sell tea, coffee, mineral water.
Russian train attendants may not speak English,
but usually there is no need to communicate a lot.
Safety
Generally, Russian trains are safe and tens of millions of citizens and guests
use them to travel every year. Police units can go with trains, as well as
ensure security on railway stations.
Still, avoid leaving your belongins unattended, keep your valuables in a safe place and beware of
doubtful contacts. In the case of an incident, you can appeal to a conductor, police, your travel agent, c
onsulate or embassy.