Nail the effortlessly neat menswear style by wearing a black double breasted blazer and light blue jeans. If you want to effortlessly perk up this getup with one single item, introduce dark brown suede chelsea boots to the mix. As you can see, it's very easy to look awesome and stay toasty when colder weather comes, thanks to this getup. As a guy in his 30s, you probably want to start dressing like a grown-up. In this case, looks like this are a fail-safe option.