NWT, 100% Authentic, Firm Price! The NikeLab Gyakusou packable Jacket is a must-have for all those runners who are looking for quality and design in a sports garment. Motivated by the Japanese designer Jun Takahashi. The color-way combines matte grey, silver grey and tin grey. Made of nylon and mesh. The NikeLAB GYAKUSOU Packable Jacket features a full-length zip on the front, knitted mesh on the armpits and small laser-cut holes on the chest and back. Women's Size Small.