Sage Quest Softshell Hoody, Blow-Out Price! Fly fishing will never be confused with an aerobics class, and against the cool morning chill mere casting or rowing may not be enough to keep your core warm. Like a warm vest built right in, features Primaloft® 120 gram insulation to keep your torso warm, without adding any bulk at your shoulders or arms to impede casting. An ideal mid-layer any time of year, the nylon/spandex double weave outer layer offers excellent wind resistance, plus our DWR finish to repel moisture. Your core never had it so good.