Experience the KUHL difference with the INVIGORATR MERINO 1/4 ZIP. We chose a superfine Merino so it's softer on your skin. Innovative AEROKNIT construction traps micro air pockets so it keeps you warmer without adding weight creating the ultimate in cold weather temperature regulation. The articulated design comes from our obsession with the study of movement. DYNAMIK stitching and micro flat seam construction make it the perfect layer for cold weather activities.