MONTANA-BRED MAINSTAY FOR OFF- AND ON-THE-WATER PERFORMANCE - ALL DAY LONG. Simms' new Big Sky LS Shirt is an everyday ally powered by water resistant, wicking, quick-dry fabric. UPF 30 protection bounces harmful UV rays, while darted, pleated, and patterned tailoring enhances mobility. Additional features include a zip-secure chest pocket, a welted chest pocket, and a sunglass chamois inside the shaped bottom hem. Snap-front style and traditional fit come standard.