The Terry Soleil Top is made of a proprietary UPF 50+ fabric that’s extremely lightweight, moisture wicking and comfortably wearable in hot temperatures. Simple crew neckline for good coverage; elastic-free arms and hemline. Athletic fit. Fabric: 88% micro polyester/12% spandex with UPF 50+Ultraviolet Protection Factor (UPF) indicates what fraction of the sun’s ultraviolet rays can penetrate the fabric (50 = 1/50th of the sun’s rays). The higher a garment’s UPF, the greater the amount of protection.