A 2-layer construction with flatlock seams, 100% wool exterior and the unique properties of technical Lifa® technology 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(r) fibers. Weight: 340g 2-in-1 base layer 2-layer construction 100% merino wool exterior Lifa® technology interior Lifa® Flow construction Non itch Flat lock seams 215g/m²