The product is a Brooks Brothers 1818 Men's Cotton Button-Up Check Shirt in a Regular Fit, size 15.5-34/35. This shirt features a classic collared neckline, long sleeves, and a button closure. Made from 100% cotton in a yellow and blue check pattern, it is suitable for both casual and business occasions. With a modern design and easy care features like being machine washable and non-iron, this shirt is a versatile and stylish addition to any man's wardrobe.