A navy shirt jacket and a dark green gingham long sleeve shirt are the ideal way to introduce some rugged elegance into your casual lineup. For something more on the daring side to finish off your ensemble, complete your getup with tan suede sandals. Clearly, it's easier to work through an extremely hot warm weather afternoon in a easy and breezy combination such as this one. When it comes to casual dressing ideas for young guys, this look is ideal.