This pairing of a mustard crew-neck t-shirt and black jeans will allow you to show your prowess in menswear styling even on weekend days. Spice up your ensemble with a more polished kind of shoes, such as this pair of mustard suede espadrilles. This getup is everything for baking hot afternoons. Those who are curious how to rock cool casual dressing as you pass the big 3-0, this combination should answer your question.