This casual pairing of a denim jacket and beige jeans is super easy to put together in next to no time, helping you look sharp and prepared for anything without spending a ton of time searching through your wardrobe. You can take a classic approach with footwear and throw a pair of dark green leather derby shoes into the mix. Clearly, it's easier to work through a blazing hot summertime day in a summery look like this. And if we're talking fashion tips for guys in their 30s, this getup looks good on most guys.