This combination of a grey crew-neck t-shirt and navy jeans is seriously stylish and yet it's laid-back and apt for anything. For a classier finish, complete your ensemble with black canvas slip-on sneakers. There's nothing like a kick-ass look to brighten up a dull autumn day. And if we're talking casual outfit ideas for guys in their 30s, this outfit looks good on almost any gentleman.
To put together a casual outfit with a fashionable spin, go for a grey crew-neck t-shirt and khaki chinos. A pair of black canvas slip-on sneakers is a wonderful idea to finish off this outfit. When it comes to dressing for transitional weather, nothing beats a killer ensemble that transitions easily between seasons. This combo illustrates how 30-something Millennial gentlemen kill in the style department.