For a casual and cool outfit, dress in a tan turtleneck and white jeans — these two items go perfectly together. Complete your look with a pair of brown suede low top sneakers and you're all done and looking dashing. As the weather starts to get warmer, it's time to shed those heavy winter clothes and opt for something lighter, like this outfit here. And if we're talking casual clothing for men in their 30s, this getup is ideal.