ADV SubZ Vest 3 is a highly functional running vest designed for intense running in cold winter conditions. This advanced cold-weather vest features a wind-protective VentairÆ front with light insulation and a bonded 3-layer design. In addition, the garment comes with a brushed jersey fabric at back made from recycled polyester and elastane for efficient moisture transfer and freedom of movement. 3-layer wind-protective and bonded VentairÆ fabric with light insulation at frontBrushed jersey fabric at back made from recycled polyester and elastaneFunnel neck for extra warmth made of recycled polyester Elastic straps at sides for snug fittingPrinted reflective details at backTight fit