If you're after a casual and at the same time seriously stylish outfit, wear a light blue vertical striped short sleeve shirt with beige chinos. On the fence about how to finish? Complement this getup with beige athletic shoes to change things up a bit. Keep this combination in your front hall wardrobe come warmer days, and we guarantee you'll save a lot of time getting dressed on more than one morning. And if we're talking casual outfit ideas for 30-something guys, this combination looks nice on most gents.