Look for winter running tights made of breathable thermal material. It is important that the tights are made of a breathable material so that when you sweat the moisture is not kept pressed against your skin. This will in turn make your legs colder and put your muscles at risk for injury. Thermal fabric material also provides better insulation for your legs and helps retain body heat.
Beware of purchasing thermal pant liners rather than thermal running pants. The two products are often sold side by side which can lead to mistakes. Thermal liners are not meant to be worn without a layer over them and will not keep you insulated during a winter run. Be sure that the thermal running tights you purchase do not say anything about pant liners on the tag. If they do, look for another pair since this is not the product you are looking for.
Where To Buy
Purchase thermal running tights from your local sporting goods store. Stores such as Dick's Sporting Goods and Sports Authority carry a wide selection during the winter season. Quality brands of thermal running tights commonly carried by these stores include Nike, CW-X, and Mizuno. Try on the thermal pants before purchasing. They will not keep your body insulated if they are too big and do not hug the skin. You also can purchase running tights from an online runner's apparel store.
Thermal running tights cost between $20 and $130, depending on the quality and manufacturer. Tights on the low end of the price scale often are made of inferior material by a lesser known company. Alternatively, more expensive tights tights are quality products made by a popular brand name. The mid-priced tights are likely the best deal since they are typically made of quality material without the price of a popular brand name.