Helly Hansen Women&#39;s HH Warm Ice Longsleeve Base Layer Shirt 57% Merino wool, 43% Polypropylene Imported Non itch, 215g/m2 Women's long-sleeve crew shirt; ideal as base layer; keeps skin dry and warm in cold weather Two-layer design, with inner Lifa fibers and an outer layer of soft merino wool Lifa Stay Dry Technology rated as one of the best base-layer fabrics by consumer tests Flat-lock stitching; low-bulk cuffs; snug, athletic fit Covered by limited lifetime warranty