HILL AIR MID GTX uses seamless mesh to lighten weight, reduce foot fatigue and increase activity. In addition, TPU, which covers the entire midsole, protects the feet in harsh outdoor conditions, and the best fit is achieved by applying Treksta's special fit technology, Nesfit, to make you feel comfortable as soon as you wear it. It is designed to maximize the moisture permeability function of Gore-Tex, thanks to a hole with a wind motif on the side. It is ergonomically patterned by applying Tresta identity design and is designed to keep the heel stable to protect your feet in harsh environments.