This is a combo pack of four long-sleeve shirts. While the shirts feature a "ck" logo on the pocket and have a tag that says "Calvin Klein Jeans," the tag also includes the brand name "Lorenzo Benzoni" and the accompanying text "JEANS WEAR," which suggests that these may not be authentic Calvin Klein brand shirts. Real Calvin Klein shirts are typically sold at a significantly higher price point and are not commonly available in this type of combo pack.

Key Features:

 * Style: Casual, full-sleeve shirts with a collar and a button-down front.

 * Material: The description on the tag mentions "cotton," indicating a comfortable and breathable fabric suitable for various seasons.

 * Colors: The pack includes four solid-color shirts:

   * Maroon or burgundy

   * Black

   * Light grey or beige

   * Dark red or maroon

 * Design Details: Each shirt has a simple, minimalist design with a small "ck" logo embroidered on the left chest pocket. The shirts have a standard collar and front button closure.