Conquer the peaks of demanding performance sports with the X-BIONIC® ENERGY ACCUMULATOR 4.0 PANTS WOMEN. The new 4.0 generation is the first to offer Retina® Ultra-High-Definition quality for unique functional precision. For targeted effects, intelligent functional zones in the ultra-dense knit can be positioned even more precisely. The patented 3D Bionic Sphere® System with ThermoSyphon® technology is more effective than ever: complex 3D structures and Y-shaped elements maximize air exchange. Functional zones such as the Innerlap AirConditioning Zone® on the inside of the thighs and the ISO-CalfPad in the calf area regulate temperature and enhance performance. The ExpansionKnee at the knee joint ensures optimal climate comfort while providing full freedom of movement.