Women's insulated skirt CRAFT ADV SubZ 2 with windproof membrane VentAir Wind is designed primarily for winter runs, but it will also do great for everyday wear. The SubZ (Sub Zero) running range is designed for sub-zero conditions. Front: 100% polyester Back: 88% recycled polyester, 12% elastane - Ventair Wind windproof membrane - elasticated panels on the sides for greater comfort when moving - wider elasticated waistband with drawcord - reflective treatment on the sides