You can’t perform at your peak when you’re sweating like a beer stein or shivering like a Chihuahua dog. That’s why it’s essential to take charge of your core microclimate – so your body can put less effort into managing temperature and more into the task at hand. And that’s where Temp Tamer Bullpen® Boxer Briefs come in. They’re built with 37.5® Tech, a revolutionary discovery that uses active particles permanently embedded in the breathable fabric to keep you in your comfort zone. When you’re hot, the particles remove sweat in the vapor stage, cooling you down without feeling wet. When you’re cold, those particles trap energy and remove moisture to keep you warm – maintaining the ideal 37.5°C core body temperature and 37.5% humidity next to your skin. Better yet, we’ve built in a supportive Bullpen pouch that keeps your man parts comfortably contained without pinching, chafing or constant adjusting. Order up a pair and tame discomforts that hit below the belt.