The innovative Hunting Boxair technology used for Hillman underwear is the world’s first created to care and maintain men’s health. By using cutting-edge materials for cooling and bamboo fiber construction for distancing the testicles from the heated body, the smart boxers provide excellent conditions for men’s fertility, no matter the activity or intensity of overheating. Developed for professional athletes, the Boxair technology delivers the utmost comfort and cares for the men’s most precious cargo by providing optimal thermal control, like no other!