Merino set is our most popular layer 1 underwear for children and juniors. The material is comfortable and soft with polyester on the inside to prevent it from itch - this does not remove the function of the garment, which effectively transports moisture away from the skin while it warms well. Merino wool is the finest and softest of all wool varieties and it's also self-cleaning, which means that it naturally breaks down smelly bacteria from the skin. The set includes a shirt and pants. 70% Merino wool, 30% Polyamide, Lining: 100% Polyester (inside trimming)