Designed to beat the heat scratch that: completely crush it DropTemp Cooling Mesh uses a highly breathable, quick-dry technology to amplify your body's natural evaporative cooling capacity. Along with strategically placed mesh panels that increase airflow in high heat zones, this system eclipses all other cooling underwear available today (our exclusive technology is third-party tested). Built for a wide range of outdoor sports and activities, DropTemp makes a day-hike through Death Valley feel like a walk in the park.