The Bjorn Daehlie Jacket Tempo trail jacket is engineered for trail runners seeking both performance and comfort. Its 100% polyester fabric makes it lightweight, allowing runners to move with great ease on rugged trails. It provides windproof properties while maintaining adequate breathability thanks to the mesh panel in the back. This key feature promotes air circulation and helps regulate body temperature during intense runs. The jacket stands out for its ability to combine insulation and ventilation, thus offering a perfect balance for the variable conditions of trail running. Specifications of the Bjorn Daehlie Jacket Tempo: Material: 100% polyesterWindproofUltra-lightweightMesh back panel Trail jacket Bjorn Daehlie ---Jacket Tempo Black