Alpinestars descender windproof vestwith a classic sleeveless design the descender windproof vest is constructed from a lightweight and durable rip stop fabric a full back mesh ventilation panel means this vest offers great breathability even when worn with a backpack features lightweight and strong 25 layer vest constructed from a windproof and water resistant rip stop fabric full back mesh ventilation panel helps keep body temperature low while protecting against wind works effectively ev