Helly Hansen Men's HH Warm Ice Base Layer Long Sleeve Crew 57% Merino wool,43% Polypropylene Imported The best wool base layer on the market Combining unique Lifa fiber technology next to skin to keep you dry, a premium merino wool exterior with superior insulating and wicking properties HH Warm, 215g/m, Pure merino wool, Lifa Stay Dry technology Flatlock stitching Allergy neutral, Non itch