The cooling effect of X-BIONIC® Underwear is only activated once you start sweating.
Its clever regulation system works with the most reliable of starters: your sweat.
One-of-a-kind and effective, with its cooling power always exactly when you need it.
Regulates your personal micro-climate, developed by scientists, proven by endurance athletes.
You know that unpleasent feeling of being sweaty, then breaking out in goose bumps.
Your body is sounding the alarm: Warning, threat of overcooling! X-BIONIC® Underwear prevents these chills. If no sweat is present, then a unique process uses air heated by the body asthermal insulation.