Schron bezpieczeństwa and other 61,700 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px.
The image is of a group of four people. All are shown as a simple head and shoulders outline only. They are close together in the center and there are four arrows pointing toward them from each diagonal direction.