Fila Heritage Racerback Tennis Tank Womens Fit: Relaxed--Full cut for ease of movement and versatility in layering. Fabric Type: Stretch--Usually a blend of knit or woven fabric with spandex or elastane. Creates a soft, durable fabric which allows freedom of movement yet retains its shape through repeated wash cycles. UV Protection--Fabric is treated to block UV (ultraviolet) radiation from the sun, helping to prevent sunburn. Ventilation--Mesh or breathable fabric inserts in high heat zones allow sweat to evaporate and cool air to circulate. Fabric Content: Body: 84% polyester, 16% spandex