Your legs also need proper protection when it's colder, so that your muscles don't cool down too quickly. The Eclipse running pants are made of Dynatherm Flex 220 fabric that has a fleece lining on the inside. This makes the pants feel comfortable against your skin, and keep the warmth inside. But the fabric is breathable, so it doesn't cause sweating.
Thanks to an elastic band with string, you can tighten the pants at the top so that it fits the body perfectly. The pants have pockets at the hips on both sides, and one of these can be closed with a zipper.