Built for technical performance and laid-back comfort the NRS Men&';s H2Core(TM) Lightweight Shirt wicks moisture, delivers mid-weight insulation, and is designed to wear alone or under tech outerwear. H2Core Lightweight technical fabric retains warmth, wicks moisture and provides advanced sun protection. Soft, high-stretch fabric provides unrestricted motion and the grid-interior allows for more airflow, letting excess moisture escape. Deliberate seam placement delivers friction-free zones under the arms for paddling and rowing comfort. Athletic fit for easy layering underneath and crew-neck collar for base layer comfort. UPF 50+ FEATURES: Weight:- 9 oz Collections:- Lightweight Fabric:- 5.2 oz. polyester/spandex blend Collar:- Crew Fit:- Regular fit Gender Sizing:- Men Features:- UPF 50+