In Jeune homme au fauteuil, we see a young man seated comfortably in a chair. The colors are vibrant, with rich blues, reds, and yellows dominating the composition. The figure is dressed in a fashionable outfit typical of the early 20th century.

The background is softly rendered, allowing the subject to stand out. The painting is executed in oil on canvas, showcasing Valtat's signature brushwork. The use of color is expressive, typical of the Post-Impressionism style. The dimensions are approximately 65 x 81 cm, making it a medium-sized portrait.

The artist's technique creates a sense of depth and movement within the piece. Louis Valtat was a prominent figure in the French art scene, associated with the Post-Impressionist movement. This work reflects his interest in color and light, as well as his ability to capture the essence of his subjects. An interesting fact about this painting is that it exemplifies Valtat's transition from Impressionism to a more personal style, focusing on individual expression.