Our warmest base layer pant. Perfect for layering when exploring in cold weather or enjoying a long day in the Dublin, Wicklow or Kerry mountains.HH LIFA merino is our warmest base layer, perfect for any type of activity in cold weather. A unique 2-in-1 base layer with 100% merino wool combined with Lifa® Stay Warm Technology in a 2 layer construction. HH LIFA merino delivers all the great benefits of merino wool fibers plus the unique properties of technical LIFA® fibers.