Following their mantra of 'function is beauty', the Trekking Vest is a real utilitarian piece of kit from Japan's Montbell, designed for life outdoors. Combining a clean design with technical fabrication-it's crafted from 70-denier nylon tussar fabric on the front and lightweight Breeze DOT mesh on the back to increase breathability. Throw it over a tee or shirt when you need a bit of extra pocket-space but it's too warm for a full jacket.