Whether you plan to wear them for training, competing, or lunchtime decompression, running shorts are built to be practical. The right fit prevents chafing, bouncing, and other distractions that could keep you from fully enjoying the sport. As with any activity, running becomes more comfortable when you have clothing that keeps you properly ventilated or, in cold and wet conditions, lightly insulated and dry. The weather typically determines what combination of clothing items you need to wear in order to stay comfortable on your runs. For warm days, your running clothes should help wick moisture, keep you cool and protect you from the sun’s rays. Shorts, a shirt and socks might be all you need on a warm day. When the temperature drops, consider wearing pants or leggings, and a vest or soft-shell jacket, but remember that you will warm up once you get moving. Insulated versions of these items are ideal for winter activities.