Power Stretch Pro Jacket WmnsThe Women's Power Stretch Pro Jacket is a midweight Polartec fleece hoody designed to be worn as either a standalone piece or as part of a layering system in cold environments. What It's Best For Expedition Climb Mountaineering Hill Walking Trekking Polartec Powerstretch Pro is a high performance layer, with a low friction outer surface to increase abrasion and weather resistance, and the ability to retain warmth whilst remaining dry and comfortable.