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