Go for a simple yet casually cool option in a grey print crew-neck t-shirt and navy chinos. If you need to effortlessly tone down your outfit with a pair of shoes, why not add a pair of white and red athletic shoes to the equation? With a look like this in your winter sartorial collection, you're guaranteed to keep warm and look amazing despite the cold weather. Wondering how to master casual looks as you slip into your 30s? This pairing is the perfect answer.