When the temperature drops below 40 degrees Fahrenheit (5 degrees Celsius), we recommend wearing long pants or tights. Keeping your muscles warm is important not just for comfort, but also for performance and injury prevention. For cold-weather running, we recommend the Tights Long. They're made of polyester microfiber for comfort and a soft feel against your skin, and they have two big pockets on the back for storing stuff. The best way to keep yourself comfortable while running in the cold is with layers. Wear shorts or leggings under your tights to protect your legs from the cold ground. If it's really cold out, consider adding a pair of socks to your outfit. Make sure to choose materials that are wind and water resistant so you don't have to worry about them when you need to get moving quickly. As for temperature, you want to make sure that it's not too hot or too cold. You don't want to be wearing tights all day every day in temperatures above 90 degrees F (32 degrees C) because it will cause discomfort and could lead to heatstroke. At the same time, if the temperature dips below 50 degrees F (10 degrees C), you'll need to make sure you have something on hand to put on after your run or you might get sick. There are many different factors that go into deciding how you should dress for running in the cold.