Saucony Women's Transition Sportop Jacket Radius Tech Mesh: 100% Polyester Ventlite 89% Nylon, 11% Spandex Imported Envelope style thumbholes keep sleeves down and hands warm, but stay covered when not in use Large, open hole performance mesh fabric offers just enough warmth to get you started on your run Long, lean fit with slight drop tail for coverage Zippered storage pocket on left forearm stows your essentials Front and back reflective elements keep you visible in low light Envelope style thumbholes keep sleeves down and hands warm, but stay covered when not in use