This is a set of four long-sleeved, solid-colored shirts, presented in a neatly folded stack. The material appears to be cotton, suggesting a comfortable and breathable feel.

Key Features:

 * Brand: Calvin Klein, with the brand name and "ck" logo prominently displayed on a tag attached to the top shirt and a smaller, embroidered "ck" logo on the left chest pocket of each shirt.

 * Colors: The set includes four distinct, solid colors:

   * Top: A classic, clean white.

   * Second from top: A light, pastel yellow.

   * Third from top: A light blue or sky blue.

   * Bottom: A deep purple or maroon.

 * Design: Each shirt features a standard button-up design with a collar and a single chest pocket. The "ck" logo is embroidered on the pocket, and the buttons match the color of the fabric.

 * Style: The shirts appear to be casual or semi-casual, suitable for a variety of occasions. The simplicity of the design and the solid colors make them versatile for pairing with other items.