When it’s cold, running tights are a runner’s best friend, especially if you are out for two hours on a long training run. But if you don’t feel comfortable in body-hugging tights, don’t despair. Most manufacturers offer several styles of running pants, including boot-cut and wide-leg styles. But the same principle holds true for running pants as for shorts; excess fabric can bunch up and cause chafing. Try on running pants on with your running shoes to be sure that your boot legs or wide legs aren't dragging on the ground, where you might trip on them.