evo.com | Burton Ball Caps > The Burton AK Helium Hat is light enough to earn its name, built for the uphill grind with power mesh panels that dump heat the second you start climbing. A low-profile 5-panel build stays breathable and out of the way, so it barely registers, even when everything else on the skin track does. Low Profile 5- Panel Camp Hat Adjustable Cinch Cord and Cord Lock Power Mesh Panels 87% Recycled Nylon / 13% Spandex | Burton AK Helium Hat 2027 in Black | Nylon/Spandex