For a relaxed casual look with a twist, you can go for a beige shirt jacket and a white and black print crew-neck t-shirt. Change up this look with a more relaxed kind of shoes, such as these beige suede sandals. It is actually possible to keep your cool under the summer heat, and this look is hard proof of just that As you see, as a 30-year-old, you have a wide range of styling options.