The SphereWind jacket by Swiss functional apparel manufacturer X-Bionic has been completely reconstructed. Further improving thermoregulation, the jacket now features the patented ThermoSyphon® technology, which maximises surface area and allows natural thermodynamics to assist with sweat management. The sleeves have been made more ergonomic with the Preset Running Sleeves, the elimination of underarm seams, and the new form of the cuffs that also aid ventilation while improving comfort. A newly developed weatherproof air outlet also allows excessive warm air to escape the jacket near the neck without causing a draft. There is also a folding guide printed on the jacket to help with storage.