Overcome every obstacle and enjoy the ease of running with the X-SOCKS RUN DISCOVERY 4.0 WOMEN. The patented high-tech features of the X-BIONIC 4.0 generation create ideal conditions for you to run more smoothly, sprint faster and feel more relaxed when you arrive at the finish line.The fit is perfectly tailored for women’s feet and promotes a feeling of wellbeing under all conditions. The breathable 3D knit of the Instep protector with AirVent Zone optimizes climatic conditions on the upper foot. The perfected Air-Conditioning Channel 4.0 also encourages ventilation by pumping fresh air towards the sole of the foot with every step.The comprehensively revised Lambertz-Nicholson Achilles Tendon Protector 4.0 now protects your foot even better against friction, pressure and shocks thanks to its reinforced padded zones. Albedo 360-degree reflective yarn on the outer hem increases safety in the dark.