The Cloud Nine Performance Scoop is an ideal base layer with versatility, warmth and comfort. This piece features an ultra-soft, mid-weight fabric utilizing ClimaSense Thermoregulation Technology that automatically adjusts to your body temperature. It does this by trapping air to maintain warmth when your body starts to cool down. When aerobic activity increases and your skin temperature rises, the fabric allows moisture vapor to escape to maintain comfort. It also offers UPF sun protection and odor regulation.