Women's Boundless Trek Layering L/S | ColumbiaOmni Shade UPF 50 guards against skin damage using tight fabric construction and modified fibers to block UVA UVB rays, so you stay protected in the sun Omni Shield repels moisture and resists stains by preventing liquids from absorbing into fast drying yarns, so you stay clean and dry in damp, messy conditions Button closure chest pocket for small items Rouching in back for a billowy, relaxed fit Locker loop in back for hanging Button up center front