Effortlessly blurring the line between elegant and off-duty, this combination of a grey open cardigan and black leather skinny jeans is likely to become one of your favorites. And if you want to instantly up the ante of this getup with one single piece, introduce a pair of black leather ankle boots to the mix. When the coldest time of the year leaves you feeling a little less-than in the outfit department, this ensemble just might fix the problem.