Fit & Design: Classic fit; fits true to size High neck collar provides added protection to the back of your neck from the sun Underarm mesh inserts for added ventilation Custom "Sun" zipper puller Technology: UPF 50 sun protection Designed with SolTek LUX(R), a stretch Jacquard pique with a three-dimensional pattern on the inner side which lifts the shirt off the skin for quicker drying, breathability and cooling