X-BIONIC 3D Bionic Sphere Base Layer uses the patented 3D Bionic Sphere System® to actively regulate body temperature during high-intensity winter training. Swiss-engineered 3D structures deliver targeted protection to the solar plexus while improving ventilation and recovery. Key attributes: Gray | Grey | Polyamide | Active temperature regulation (3D Bionic Sphere System®) | Moisture management | Breathable fabric | Insulating during recovery | Advanced solar plexus protection | Strategically positioned 3D ventilation zones | Dimensions & fit: Athletic fit | Composition & care: 87% Polyamide, 7% Polypropylene, 6% Elastane | Machine wash 40°C mild process. Do not bleach. Do not tumble dry. Do not iron. Do not dry clean.