X-BIONIC® Energy Accumulator® is the first genuinely hi-tech underwear. It works to maintain body temperature at an optimum 37°C, cooling you down when you sweat and keeping you warm when you’re cold. Its clever regulation system works with the most reliable of starters: your sweat.
Inspired by nature, created by scientists, tested by endurance athletes, X-BIONIC® fits like a second skin and incorporates features designed to meet the entire range of sport-specific demands. Winner of more than 300 international awards.