Sugoi Women's Jackie Long Sleeve Top Body: 100% Polyester; Mesh: 75% Polyester/25% Spandex Imported Flat seams for increased comfort Moisture wicking, antimicrobial fabric for breathability and cooling and UPF 50+ protection Back yoke mesh vents provide increased moisture management Smart seam construction to reduce abrasion during movement Contoured hemline gives a smooth drape on the body and prevents rising while running