Double deck concept was interesting, because it offers cost reduction both in build and operation. Finnish loading gauge is also big enough for double deck wagons.
All coaches are pressure tight and air-conditioned.
The coaches have also passenger information system and sockets under fixed tables for charging laptop computers and mobile phones. Lower deck has amplifier for better use of mobile phone, upper deck is more quiet also in this respect. The floor height of 55 cm is on the same level as new or rebuilt platforms. The coaches are based on modular design and have aluminium body. First batch of 42 coaches was ordered in 1995 from Transtech with order value of FIM 500 million.