An olive blazer and a crew-neck t-shirt are both versatile menswear essentials that will integrate nicely within your day-to-day off-duty arsenal. Take a more relaxed approach with shoes and complement your getup with white canvas high top sneakers. This ensemble isn't a hard one to score and it's season-appropriate, which is most important when it's blazing hot outside. Think you can't pull off modern off-duty dressing as you pass the big 5-0? This combination is solid proof of otherwise.