Runners need to take precautions when running in the heat and humidity. Follow these tips for how to dress properly for hot weather running.
Wear Synthetic-blend Clothing
Avoid wearing cotton when running because it holds your sweat and doesn't dry quickly, which can lead to chafing. Synthetic fabrics (such as CoolMax or Dri-Fit) wick moisture away from your skin so cooling evaporation can occur. Although the technical fabric running clothes may cost a little more, you'll appreciate the comfort -- especially during long runs.Choose Running Socks Carefully
Don't wear 100% cotton socks during your runs. Your feet will most likely be sweating a lot, and cotton tends to keep your feet wet, which can lead to blisters. Look for synthetic blends like those made from polyester, acrylic, or CoolMax, which are best at wicking away moisture.Dress Lightly
Light-colored, loose-fitting clothing will help your body breathe and cool itself naturally. Tight clothing restricts that process, and dark colors absorb the sun's light and heat. Light colors reflect the sun from your skin.Wear Shades
A good pair of running sunglasses help protect your eyes from the sun's damaging rays. Also, wearing running sunglasses helps prevent headaches that come from squinting.Use Sunscreen
Apply your sunscreen (at least SPF 15) before you get dressed for your run. Some summer running clothes are made of mesh or very thin fabric, so they might not provide protection from the sun's rays. Also, your clothes move when you run (or you may choose to take off some clothes, like your shirt). So it's best to make sure you're fully covered with sunscreen.When Should I Throw Out Sunscreen?

