Experience the KUHL difference with the INVIGORATR MERINO 1/4 ZIP. We chose a superfine Merino so itâ€s softer on your skin. Innovative AERO KNIT 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.Articulated design for superior mobility and fit Aeroknit - softer, lighter, warmer Merino wool Durability and strength with a touch of nylon for fabric stability DYNAMIK stitching for increased stretch and strength Versatile layering performance Temperature-regulating 1/4 zip design Imported AeroKnit | 95% Merino Wool, 5% Nylon | 265 GSM Merino wool blend naturally regulates body temperature Keeps you dry and comfortable all-day Ultra-light and soft Naturally odor resistant A touch of nylon added for strength