Best Use: All ConditionsThe Women’s ULTRA Merino 145 LS Crew is made from a high-performance blend of New Zealand Merino wool with a nylon core for added durability. It’s lightweight, incredibly comfortable, and versatile across all conditions. It serves as standalone next-to-skin top in warm conditions and as a base layer in colder conditions. Low-sheen, itch-free, moisture wicking, and naturally odor resistant, the ultra-fine 17.5-micron Merino wool is an ideal choice for hunters needing a long term, effective solution in a wide range of aerobic activities and weather conditions.