In addition to the breathability of the fabrics used, Quechua develops technical solutions (zips, air vents, mesh, etc.) to improve the overall ventilation of all its jackets and over-trousers designed for use on long hikes (Forclaz, Bionnassay and Helium lines). These ventilation systems regulate the temperature inside the garment while also helping to eliminate the perspiration generated by the body during physical activity.