A timeless staple for the most informal and relaxed dress codes, the classic crew-neck T-shirt and its countless variations on the theme, such as crop tops or long-sleeved T-shirts, are a wardrobe essential. Pair the white T-shirt with a pair of formal trousers for an effortless chic look, pick up your colourful T-shirt palette to create new combinations every day, or opt for a striped T-shirt to give your own take on the classic marinière style.