travel28- I agree with you that carrying a comb with you is essential to combating hat hair. I also have another solution to hat hair. I usually wear hats on hot summer days to keep the sun off my face. However, these hats often left my hair very sweaty and matted down. I have since started wearing visors instead of hats. Visors still keep the sun off my face, but they don't go all the way over the head. When I take off the visor, it has not affect my hairstyle.