A black long sleeve shirt and black skinny jeans are the kind of a never-failing casual combo that you so awfully need when you have no time to put together a look. To add an extra dimension to your outfit, add slip-on sneakers to the mix. There's no better way to spice up a bleak autumn day than a killer ensemble like this one. All in all, a great example of off-duty style for 20-something gents.