Such staples as an orange harrington jacket and black jeans are the ideal way to introduce some cool into your casual routine. Puzzled as to how to finish off? Introduce athletic shoes to your getup for a more casual feel. As the weather begins to warm up again, it's time to shed those bulky winter clothes and choose something lighter, like this ensemble here. This ensemble proves that as a 30-something gentleman, you have a wide array of style options.