NRS H2Core™ Silkweight fabrics maximize breathability and sun protecting while enhancing the body's natural cooling process. A relaxed fit provides casual comfort on and off the water. Provides advanced sun protection for SUP, kayaking, rafting and other active water sports. UPF 20 Relaxed fit for casual comfort, and friction-free zones under the arms ensure comfortable paddling and rowing. Technical fabrics wick moisture away from the skin, breathe freely and dry quickly for cool comfort on the water.