Ted Baker Tailoring Slim Fit Irvinws Waistcoat. Perfect to wear with a three-piece suit or on its own with a plain shirt and tie, the Irvinws Waistcoat has been crafted from a soft cotton fabrication with a twill construction for a high-quality finish. Styled in a slim fit silhouette, this piece offers a V-neckline secured with a button fastening, two-button styling, and an adjustable fastening to the patterned lined rear for a figure-hugging silhouette with a statement touch. Available in Black.