CLOTHING

Clothing 
All exercise clothing should be loose-fitting to permit freedom of movement, and should make the wearer feel comfortable and self-assured.
As a general rule, you should wear lighter clothes than temperatures might indicate. Exercise generates great amounts of body heat. Light-colored clothing that reflects the sun's rays is cooler in the summer, and dark clothes are warmer in winter. When the weather is very cold, it's better to wear several layers of light clothing than one or two heavy layers. The extra layers help trap heat, and it's easy to shed one of them if you become too warm.
In cold weather, and in hot, sunny weather, it's a good idea to wear something on your head. Wool watch or ski caps are recommended for winter wear, and some form of tennis or sailor's hat that provides shade and can be soaked in water is good for summer.
Never wear rubberized or plastic clothing. Such garments interfere with the evaporation of perspiration and can cause body temperature to rise to dangerous levels.
The most important item of equipment for the runner is a pair of sturdy, properly-fitting running shoes. Training shoes with heavy, cushioned soles and arch supports are preferable to flimsy sneakers and light racing flats.