As the oldest French house in operation, <a href="http://www.mrporter.com/mens/Designers/Lanvin">Lanvin</a>'s faultless craftsmanship and quiet luxury is legendary. This colour-blocked navy and tonal-grey blazer is made from a plush virgin wool-blend with a touch of added stretch to ensure comfort. Typifying the label's contemporary, easy-to-wear aesthetic, it's cut smart and slim and just partially lined. It can be easily dressed down with denim or worn on smarter occasions with crisp shirting and polished Derby shoes.