Sacoches and pants with smartphone pockets are popular, but a vest is convenient for mountain climbing. This multi-functional pocket vest uses CORDURA®, which is strong against abrasion, tearing, and fraying. By opening the slit zipper at the hem, it doesn't interfere with the backpack's waist belt. The mesh back releases heat from inside the clothing, improving comfort. DWR (80 points after 10 washes)