The Asics Fujitrail Jacket is specially designed to cope with trail running in all sorts of weather conditions. Firstly, the Fujitrail Jacket is very lightweight, and at the same time highly breathable. Moreover, the jacket has been given a waterproofing treatment on the outer surface, so it is able to withstand light rain outside. Asics has also focused on the importance of the Fujitrail jacket being as well fitted to trail runners as possible, which is why it has been designed with specific ergonomic properties with the help of 3D motion analysis. In addition, not only is there enough room under the jacket to wear a rucksack, but there are also several laser-cut holes in the back of the jacket, which act as ventilation.