Why not rock a red long sleeve shirt with charcoal skinny jeans? As well as very functional, these items look amazing worn together. You can stick to a more casual route on the shoe front by sporting a pair of white athletic shoes. You're guaranteed to always look stylish even despite the sweltering heat if you have this ensemble as a last-minute grab. As you can see here, in your 30s your sartorial options are pretty much limitless.