Pair a crew-neck t-shirt with khaki jeans to create an everyday outfit that's full of charm and character. Add a pair of brown brogue boots to this look for extra style points. While it can be a bit daunting to stay on-trend in cold temperatures, it's getups like this that prove it's actually possible. As you step into your 30s, you want to start dressing like an adult man. That's when combinations like this are a safe option.