Ronhill Lady Vizion Long Sleeve Running Top Lightweight and Breathable fabric - with a premium quality wicking treatment allowing you to stay dry. UPF 40 - certified to block at least 97% of the suns harmful UV rays Modern Feminine Neckline - Specially designed for a more feminine look. 360 Degree Reflective Details - For keeping you safe in low light conditions. Flat Lock Seam - to reduce chaffing and irritation to the body