I don't know why school track classes wear sweatpants and sweatshirts. The wind blows right through them and is very cold on bare skin. After you run for a while and get sweaty it is worse because the fabric absorbs the sweat becomes ice cold. This ice cold fabric then blows up against bare skin.
Never wear sweat pants and if you wear sweatshirts make sure to have a long sleeved t-shirt underneath and a vinyl windbreaker over it.