Merinos are regarded as having some of the finest and softest wool of any sheep. Merino wool is finely crimped and soft. Ultra fine wool is suitable for blending with other fibers such as silk and cashmere. Merino is excellent at regulating body temperature, especially when worn against the skin. Merino has an excellent warmth-to-weight ratio compared to other wools. Like most wools, merino contains lanolin, which has antibacterial properties.