Run efficiently without overheating! The TWYCE 4.0 RUN SHORTS WOMEN from the X-BIONIC® 4.0 generation offer you the largest cooling surface of all X-BIONIC running shorts. They perfectly equip running enthusiasts to maintain high activity levels in warm weather. Their first advantage is the patented, award-winning, and exceptionally effective ThermoSyphon® system, the next generation of the 3D Bionic Sphere® system in the front area. Its complex 3D structures and Y-shaped elements maximize air exchange. It cools when you sweat and warms when you feel cold - and it achieves these heating and cooling effects faster and more efficiently than ever before. Their second advantage: This precisely manufactured functional clothing for runners is made in Retina® Ultra-High-Definition quality. The difference is felt in the highly effective density, the intense functional transfer, and the exactly defined functional zones. The shorts are equipped with a convenient back pocket.