A blue denim jacket and a navy crew-neck sweater are essential in any modern man's versatile off-duty arsenal. Complement your outfit with white canvas low top sneakers to add an air of stylish nonchalance to this getup. So if you're on a mission for an ensemble that's stylish but also feels entirely season-appropriate, this one is great. This getup shows that as a 30-something Millennial guy, you have a wide array of dressing options.