The versatile LIFA Merino crew keeps you warm and dry during any type of cold weather activity, so you can get outside and stay outside longer. Helly Hansen combined a 100% merino wool layer with their proven LIFA fiber technology in a 2-layer construction. Their unique performance LIFA Merino fabric delivers all the breathable warmth of merino wool fibers, plus the unique moisture management properties of LIFA fibers. It excels at technical performance. It’s also super-soft and comfortable.