One of the most important things to consider when piecing together a winter outfit is warmth. Because frankly, nothing is worse than setting foot outside only to discover that you're not adequately dressed for the chilly temperatures. That situation, however, is easy to avoid—you just have to ensure you're wearing pieces rendered in heavier fabrics like wool, cashmere, or denim and that you layer, layer, layer. But if you need a little help figuring out what exactly a good warm winter outfit looks like, you've come to the right place. Ahead, see how fashion girls are staying toasty this cold-weather season while still looking oh so fashion-forward. Then, shop our roundup of must-have pieces to invest in ahead of the winter.