Product: Calvin Klein (CK) Jeans Classic Combo Set Shirts

Description:

This is a combo set of four long-sleeved, full-collar shirts, likely made of cotton. They are stacked and folded, showing a variety of solid colors. Each shirt has a small, embroidered "ck" logo on the left chest pocket.

Colors in the set (from top to bottom):

 * Maroon/Burgundy: A deep, rich, reddish-purple color.

 * Olive Green: A muted, earthy green tone.

 * Maroon/Dark Red: A similar deep red color to the top one, but perhaps a slightly different shade.

 * Light Blue/Sky Blue: A bright, pastel blue color.

Key Features:

 * Material: The fabric appears to be a smooth, solid-color cotton or a similar blend, suitable for a casual or smart-casual look.

 * Style: The shirts are styled with a standard collar and appear to be a regular fit. The sleeves are full-length, and they each have a single button at the cuff. They feature a single chest pocket on the left side.

 * Combo Set: The product is sold as a pre-packaged set of four shirts, offering a variety of colors in one purchase.