88% polyester/12% elastane Coolcore® fabric with Coloright™ technology that helps prevent dye migration, Coolcore® fabric is engineered to distribute moisture quickly throughout the garment. As the moisture spreads it dries faster and keeps you cool and comfortable, UPF 50 sun protection, 4-way stretch properties allow for increased mobility, Tag-free label, Three-button placket, Set-in sleeves, Side vents