Group poll: How many of you blow-dry your hair during the summer? For those of you who said “me” without hesitation, we have one question for you: Do you have superpowers? Because anyone who can withstand the forceful heat of a blow-dryer on a 90-degree day is a hero in our book. If you’re like the rest of us and can’t stand the feeling of sweat beads on the nape of your neck, check out these seven hairstyles that require no heat tools.