The original KLIMA(R) Balaclava is a perfect balance of performance and lightweight with integrated CoolmaxA(R) fabrics on the head and WINDSTOPPERA(R) fabric in the neck area. COOLMAXA(R) BREATHABLE MOISTURE WICKING FABRIC ON TOP BACK STRETCH FABRIC TO FIT DIFFERENT HEAD SIZES/SHAPES ERGONOMIC PATTERNING FLAT LOCK STITCHING FOR COMFORT GOREA(R) WINDTOPPERA(R) NECK