A blue denim shirt and navy skinny jeans are amazing menswear must-haves that will integrate nicely within your current casual arsenal. Don't know how to round off your outfit? Finish with a pair of brown suede casual boots to spruce it up. With an ensemble like this in your winter arsenal, you'll manage to stay cozy and look amazing despite the nasty weather. Now that's an ensemble any 30-year-old man will like.