All socks aren't made the same and with that thought in mind, we're on the hunt for the coziest pairs to keep your feet cozy even on the coldest of days. The key to finding the perfect ones? The denser, the better. It's all about retaining your body heat so look for tight-knit socks that will hold in heat much better than looser, open weave socks. While we prefer chunky socks for pairing with boots, thinner cashmere socks are just as warm if you're looking for something more suitable for pairing with oxfords or lower profile silhouettes. Also, don't forget about your rain boots: wellie socks are an absolute base layer necessity when it's cold and raining outside. Shop our top Winter-approved pairs in the slideshow now.