Is it fine for me to wear a cap to cover my hair? I just finished showering but I was in a hurry. I grabbed my cap and keys and head out. The sun was really harsh so I wore my cap immediately to cover my head from the heat. I met up with a few friends and one of them commented to let my hair dry out first before putting the cap on. I didn't know the reason but I just took off my cap and let my hair dry. Does anyone know the real reason behind it? Any specialist here?