<a href="http://www.mrporter.com/mens/Designers/Lanvin">Lanvin</a>'s head menswear designer Mr Lucas Ossendrijver believes reserved style gives designs a poetic quality. This crisp white cotton-poplin shirt is detailed with a mandarin collar framed with black piping. It has a curved hem and slit sides to enhance its slim cut - a shape that's perfect to layer over tees or sit under blazers.