4 oz., 100% polyester. Performance fabric provides greater comfort during strenuous activity and intense play. Fabric is proven to absorb, wick and evaporate more moisture than cotton. Quick drying and breathable. Anti-microbial, anti-static, anti-odor properties with UPF 50. Bottom hem has double-needle topstitching and Side Vents. Inside neck is clean-finished with self-fabric tape. Sideseamed. Set-in sleeves with open hem. Heat-absorbing capacity for decorating purposes. Three-button Placket with flat-knit collar.