Office workers and drivers beware: Studies show that sitting, driving, varicocele, and high BMI will overheat the s and reduce count and quality. The Underdog is a patented cooling device designed to optimize testicular temperature and prevent overheating. It uses a wedge-shaped insulated cooling pack placed outside your pants and under your s. Its engineered insulation provides the optimal amount of cooling. Ice your balls with The Underdog whenever sitting for longer than 20 minutes. Each pack lasts 3-4 hours. A spare pack allows all-day cooling e.g. at the office , commuter, or professional driver. Optimize your today. Your kids are worth it.