In Man sjouwt een zak door een straat, we see a man laboriously carrying a sack through a bustling street. The colors are muted, with earthy tones dominating the scene, reflecting the everyday life of the working class. The figures are depicted with a sense of realism, capturing the man's effort and the environment around him.

The background features buildings that suggest a typical urban setting of the time. This painting is executed in oil on canvas, a common medium for the period, allowing for rich textures and details. The brushwork is precise, emphasizing the contours of the man's body and the folds of the sack he carries. The composition is balanced, drawing the viewer's eye along the path the man takes through the street.

The use of light and shadow adds depth to the scene, enhancing the three-dimensionality of the figures. Isaac Israëls was known for his depictions of urban life and the working class, often focusing on the struggles and realities of everyday existence. This particular work reflects his interest in capturing candid moments of life, showcasing the dignity of labor. An interesting fact about this painting is that it exemplifies Israëls' transition from Impressionism to a more realistic style, as he sought to portray life as it was, rather than idealizing it.