Calvin Klein Stretch Wool Slim Blazer. Made from virgin wool, this slim fit blazer has enough stretch to ensure the perfect fit for a flattering shape. With a two-button fastening, flap pockets at the hip, a welt chest pocket and two inner pockets, this blazer is classic, timeless as well as practical. Wear with matching trousers for the full smart suit, or throw over a sweatshirt and trousers to smarten up a casual outfit. Part of the Core range.