Pure virgin merino wool is the ideal base layer for close to skin sport garments. Mover has been using merino since 2004 to replace all synthetic underwear, and uses merino jersey as a functional liner for its trousers and more active oriented ski jackets. 100% wool, not blended with polyester or polyamide, the extrafine quality used is less than 19 microns thin and sourced from New Zealand. This naturally active fiber reacts to changes in body temperature, allowing you to stay warm when the weather is cold, and to stay cool when the weather is hot. No itching, no odour, easy care, machine washable.