The M&S Active Waist Trousers in size 40" waist and length 31" inside leg are a stylish and versatile addition to any man's wardrobe. Made from polyester, these black trousers feature a flat front, mid-rise, and straight leg design. Perfect for autumn and winter, these machine washable trousers are suitable for both casual and smart-casual occasions. With a slash pocket detail, these dress pants from Marks & Spencer offer both comfort and style for the modern gentleman.