While January can signal fresh starts and new year resolutions, it can also be filled with chilly, frostbitten days. Regardless of whether you've been inundated with snow or the temperatures are just a tad too low for your taste, chances are, you'll want the cozy up in some warm pants that will protect you from the elements.

Below, we've rounded up some of our favorite bottoms to keep you toasty all season long. Best of all, they're up for grabs at Amazon, where you can nab free two-day shipping with your Prime membership. Check out our favorites!

The words "fleece lined leggings" may make up the snuggliest phrase in the English language. These thermal pants look like activewear on the outside but are lined with soft, waterproof fleece that are guaranteed to keep you nice and warm. They're available in a ton of colors (and we mean tons, ranging from neutrals like black and gray to standout hues like maroon and light blue) with options for one or three pockets. Sizes are also available in XS to 3XL.

If leggings aren't your thing, then you definitely need these sherpa lined sweatpants in your closet rotation. Complete with a 4.4-star rating from more than 19,600 Amazon buyers, shoppers described these bottoms as super comfy, warm and cozy. They boast an easy drawstring waistband and are available in a few different colors with sizes that range from XS to XXL. The sherpa lining is ideal for chilly movie nights while snow falls outside — just as long as you forget about having to shovel the next morning.

While on the pricier side, these UGG pants are incredibly cozy (and trendy) thanks to the sweater knit design. Yes, they're like a sweater for your legs — I'll wait for you to click 'add to cart.'

The machine-washable fabric feels just as comfy on the inside as it does the outside, and they boast a flattering high-waisted fit with an elastic waistband. Whether you pair them with a sweatshirt or a matching sweater, they'll definitely be your new favorite add to your loungewear collection.

Joggers are essentially sweatpants but just a tad bit more presentable thanks to the cuffed ankles and slightly more fitted look. These thermal joggers are perfect for throwing on to run errands or relax at home, especially because they're lined with cozy fleece. They have a thick waistband with a drawstring closure, two zippered pockets and are waterproof — sign us up, please!

Long live long johns! These fleece lined thermals are a must-have for any winter wardrobe since you can toss them on beneath jeans, work pants or trousers. The soft, heat-retaining fabric boasts a moisture-wicking four-way stretch that's ideal for snowy, stormy days. You can grab them in a multitude of colors with sizes from XS to 3XL.

If you live in a place where it storms a lot during the winter, you may want to invest in a pair of pants that can keep you warm and safe from fluffy snow or pelting sleet (thanks, Mother Nature). Columbia's Storm Surge pants are a great middle ground between functionality and comfort — they're waterproof and breathable, featuring an all-wather material on the outside, while the interior have a mesh lining specifically designed to keep you protected. There are a variety of sizing options available too, starting at XS short and ending at 3X short.