Constructed of a performance blend of Merino wool, polyester, and elastane, the Outdoor Research Women's Alpine Onset Crew is a low-profile insulating baselayer that delivers comfort and warmth, effectively wicks moisture, and offers odor resistance. The blended fabric's soft Merino wool has natural insulating and quick-drying properties. The addition of recycled polyester and elastane increases overall durability and provides a bit of fit-enhancing stretch. Flat seam construction and raglan sleeves further enhance both comfort and fit. Available in your choice of size and color options, the Outdoor Research Women's Alpine Onset Crew has a next-to-skin fit that anticipates being worn as a baselayer and allows you to comfortably layer over top of it.