| Low-floor train (Sm4) | EMU (Sm1) |
| low-floor setup to enable easy access | ticket vending compartment |
| ticket vending compartment | space for prams |
| space for prams | space for wheel chairs (requires lifting into/off the train - assistance not provided) |
| services for the disabled | toilets |
| space for pets | space for pets |
| toilets (toilet for the disabled) | space for cycles |
| space for cycles | |
| air conditioning | |
| passenger information displays | |
| recording security cameras |
| EMU (Sm2) | Locomotive-hauled Eil trail |
| ticket vending compartment | ticket vending compartment |
| space for prams | space for prams |
| toilets | space for wheel chairs (requires lifting into/off the train - assistance not provided) |
| space for pets | toilets |
| space for cycles | space for pets |
| space for cycles |

The commuter trains are of four types. The Sm1 and Sm2 type EMUs, totalling 100 units, represent an older fleet built in 1968-1981. All the trains have been modernized.
In peak-hours also locomotive-hauled Eil cars are used in commuter services. Their total number is 57.
The most recent train type is the Sm4 low-floor train. The entrance and the passenger compartment between the vestibules is on the same level as the raised station platforms, to permit an easy access for passengers with a pram, wheelchair or bicycle. If necessary the train's conductor sets up a ramp to enable easy access for persons with reduced mobility.
Low-floor trains save electricity by reusing current generated braking energy. Thus approximately 25 percent of the train's braking energy is reused.
The low-floor rail services are listed in the commuter services timetables.
| Seating | Speed | Weight | Width | Length | Height | |
| Sm 4-trains | 184+8 pivot - seats/unit | 160 km/h | 107,0 t | 3,2 m | 54,8 m | 4,4 m |
| Sm 1-trains | 175+16 pivot - seats/unit | 120 km/h | 96,6 t | 3,2 m | 53,2 m | 3,9 m |
| Sm 2-trains | 179+14 pivot - seats/unit | 120 km/h | 77,0 t | 3,2 m | 53,2 m | 3,9 m |
| Eil-trains | 105+8 pivot - seats/unit | 160 km/h | 42,3 t | 3,0 m | 26,4 m | 3,9 m |
Travel comfort improves significantly in Helsinki commuter services as the new Flirt commuter trains enter service at the end of 2009. The rolling stock company's CEO Yrjö Judström says the trains will most likely start running on the Leppävaara and Vantaankoski lines.
Pääkaupunkiseudun Junakalusto Oy has ordered a total of 32 low-floor electrical multiple units (EMU) from Swiss Stadler Bussnang AG. The new trains will partly replace old rolling stock in commuter services. More trains will be needed as the ring rail line is constructed and a new connection is established between Helsinki centre and Helsinki-Vantaa airport.
The new commuter train is easily accessible also to persons with reduced mobility and passengers with prams since it has a mainly low-floor setup and there are no interior doors to hinder movement. The trains have air conditioning and have information displays to provide information to e.g. passengers travelling to the airport.
The brand name Flirt is an acronym for Fast Light Innovative Regional Train.
Read more on the new commuter trains on the web site of Junakalusto Oy »