X-Bionic FENNEC 4.0 RUN - Base Layer - Men's - anthracite/silver

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Use: running, trail



  • High performance design
  • Tight, ergonomic fit
  • Optimal muscle compression
  • Intake heat regulation: sweat wicking and cool
  • Reduces vibrations
  • Optimal freedom of movement


  • Retina
  • Xitanit®
  • Neural-Response-Effect
  • ThermoSyphon®
  • PartialKompression
  • 3D-BionicSphere®


  • Improves muscle performance
  • Cools as you sweat and heats when you're cold
  • Optimal body temperature
  • Targeted compression and accelerated recovery


  • 63% polyester
  • 32% polypropylene
  • 5% elastane

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XITANIT®: Unique fibre enabling:

  • Body heat distribution
  • Reflect radiant external heat for exterior warmth and interior freshness
  • Sweat wicking for quick and controlled evaporation

Composition: 100% polyester


ThermoSyphon®: Innovative sweat wicking: excess sweat is evacuated, leaving a thin layer in contact with the skin to enhance heat regulation without wasting energy and preserving nutrients that are essential for performance.


Retina: Precise body mapping system that optimises the efficiency of this technology by enhancing stimulation with strategically placed zones. 


3D BIONIC SPHERE®: This system leaves a thin layer of moisture on the skin without it bothering the skin. It wicks away excess sweat, enabling it to evaporate through the dynamic thermal layer. The unique patented 3D-BionicSphere® system preserves resources to help you perform better. Less energy is spent regulating body temperature, leaving you with more energy for exercise.


PARTIALKOMPRESSION®: X-Bionic® partial compression uses the advantages of compression without neglecting cooling. X-Bionic® PartialKompression applies targeted pressure across 1 mm wide ridges. There is no compression in areas where it can have negative effects. PartialKompression uses the skin as a cooling surface, making use of the micro-climate to optimise performance.


Neural-Response-Effect: This system exerts constant targeted pressure on the peripheral neurons, creating a fight or flight response. This relationship with the nervous system allows optimal muscular performance and enables quicker reaction times, increased muscle contraction and helps improve coordination. This also helps reduce the risk of injury and reduces fatigue.