A lightweight Merino wool blend made to deliver all the benefits of this natural fiber in a stylish, traditional and multi-functional base layer.. Everyday Essentials. This base layer begins with the Mimosa™ fabric, a blend of Merino wool, nylon and spandex. With Merino wool being the biggest component, this natural fiber delivers the unique qualities that no other material can duplicate; highly breathable and moisture moving with superior insulation properties, even when wet. Wool\'s ability to trap countless tiny pockets of air in order to create a microclimate of warmth is unique and the synthetic fibers help to keep the fabric soft and to maintain a contemporary fit.. Giordana Merino Wool Blend Base layers are available in both long and short sleeve variations. They are constructed from four panels to contour to the body comfortably under jerseys and jackets, the small bit of spandex in the base layer\'s mix helps create a more form-fitting garment allowing the benefits of the Merino wool to be fully realized.. A cool/cold-weather cycling base layer. Merino wool with synthetics for stretch and durability. Manages moisture and resists odor while insulating. Stays warm even in the presence of moisture