Is it better to run through short sleeves or long sleeves at 20 degrees?

Nice short sleeves. Because the weather at 20 degrees is still lukewarm, running at 20 degrees will be very hot. Generally, short sleeves are breathable and comfortable to wear. Wearing long sleeves when running will make you feel very hot. Therefore, it is easier to dissipate heat when running through short sleeves at 20 degrees. Short sleeves are one of the indispensable clothes for people in summer. With its natural, comfortable, chic and dignified advantages, it has gradually replaced the old pattern of men wearing vests or sweatshirts plus a short-sleeved shirt or a Hong Kong-style shirt, and has become a fashion that people are happy to wear.