Teaming a mustard short sleeve shirt with khaki cargo pants is a smart option for a relaxed casual getup. For something more on the daring side to complement your getup, complement this getup with a pair of beige athletic shoes. So if it's a roasting hot summertime day and you want to look dapper without putting too much effort, this outfit will do the job in seconds time. When it comes to casual clothing for young men, this combination is perfect.