Crew neck, rolled forward shoulder eliminates seam at top of shoulder, flat seam construction, 100% Micro Denier polyester. Engineered two-sided construction. Ec2 Qwik-Dri moisture management. Anti microbial for freshness. Knit with air pockets for added moisture management. Fabric weight: 3.9 oz (139 g). UPF rating: 25+. Limited quantity on Olive.