Garnish that melon of yours with this stylin' piece of headwear! The new 1st Phorm Frontrunner features a stretchable polyester mesh spandex side and back to create a perfect fit; no matter what size dome you're lugging around on a daily basis. Its mid-profile design stretches to fit a wide variety of head sizes comfortably. How's the breathability, you ask? Oh, it's pretty damn excellent! Leaving your head dry and your hat less stinky in the long run. A few other pieces of info you might want to know: 55% Nylon, 30% Polyester, 9% Cotton, 6% Spandex.