Teaming a blue gilet and a turtleneck will hallmark your skills in menswear styling even on off-duty days. A pair of dark brown leather desert boots can integrate smoothly within a ton of looks. A solid combination to demonstrate the world your maturity as a man in his 30s.
This combo of a blue gilet and a turtleneck is irrefutable proof that a simple off-duty look can still be really interesting. As you pass the big 3-0, you probably want to start dressing more like a mature gentleman. In this case, inspiration like this proves very useful.