Koleje Śląskie is a regional rail operator in the Silesian Voivodeship of Poland. The company was founded in 2010 and is fully owned by the local government. It started servicing in October 2011.

Newag Impuls is a family of standard-gauge electric, diesel and bi-mode (hybrid) multiple units manufactured by Polish railway rolling stock manufacturer Newag. Manufactured in several versions, they differ in the number of cars and purpose. The company offers several versions: electric 2-car, 3-car, 4-car, 5-car and 6-car trainsets, and also diesel and bi-mode 3-car ones.