The best choice for a kick-ass off-duty getup for men? A turtleneck with black skinny jeans. If you wish to effortlessly kick up your outfit with shoes, why not introduce black casual boots to the equation? While it can be a bit of a conundrum to stay fashionable in the dead of winter, it's combinations like this that prove it's totally possible. All in all, an ideal example of laid-back fashion for 20-something gents.