18 jeans that will keep you warm this winter

We've officially reached that time of year when just going outside brings numb appendages and the threat of frostbite. While the standard hat, mitt, and scarf combination remains our first line of defense, we're happy to report that we've found a surprisingly stylish source of undetectable armor for our legs: fleece-lined jeans.

Tucked away somewhere between your standard denim and ski wear, fleece-lined jeans provide an extra layer of protection while looking completely normal to the untrained eye; no bulky layers or heavy fabrics here. More importantly, fleece-lined jeans are actually warm. You feel bundled up for the ski slopes, which motivates you not to completely hate venturing into the great outdoors.

In our ongoing efforts to wage a sartorial war on winter, we've rounded up 18 pairs of stylish and affordable fleece-lined jeans designed to keep you warm this season. Find your new winter must-have below!