Key Features:

 * Material: The shirts are described as "pure cotton," which indicates they are likely made from 100% cotton fabric. This type of material is known for its softness, comfort, and breathability.

 * Design: Each shirt has a clean, solid color with a small Tommy Hilfiger flag logo embroidered on the left chest. This is a hallmark of the brand's classic and casual apparel.

 * Sleeves: The shirts have full sleeves, suitable for cooler weather or a more formal casual look.

 * Fit: While not explicitly stated, Tommy Hilfiger shirts are typically available in various fits, such as Regular Fit, Slim Fit, or Classic Fit. The appearance of these shirts suggests a standard or regular fit.

 * Collar: The shirts have a button-down collar, with a single button visible at the neck on the top shirt in the stack.

 * Colors: The four shirts in the stack come in a range of solid colors, including:

   * Black (Top shirt)

   * Light peach/skin tone (Second from top)

   * Maroon/burgundy (Third from top)

   * Mustard yellow (Bottom shirt)

 * Branding: The most prominent brand identifier is the Tommy Hilfiger flag logo embroidery on the chest. The shirts also have a hang tag attached, featuring the full "TOMMY HILFIGER" brand name printed vertically on a red, white, and blue striped background, which is a key part of the brand's identity.

Note on Authenticity:

If you are looking to purchase these shirts, it is important to be cautious of counterfeits. When identifying genuine Tommy Hilfiger products, look for:

 * High-quality stitching: The stitching on the logo and seams should be clean, even, and well-executed.