If you want take your off-duty look to a new level, pair a navy trenchcoat with skinny jeans. And if you wish to immediately tone down your outfit with a pair of shoes, grab a pair of navy low top sneakers. Seeing as the weather is getting chillier with each day, this ensemble appears a viable idea for in between seasons. When it comes to casual fashion for men in their 30s, this combination is a good look on almost any gent.