The Thermal Contrast Shacket is a versatile and stylish piece that combines the best features of a shirt and a jacket, offering both comfort and a fashion-forward look. thermal fabric, lots of coziness, making it ideal for transitional weather or as a layering piece during colder months. The contrasting details. With a button-down front, it's easy to put on and take off, and it allows you to adjust your level of warmth depending on the weather