NIKE Lady Dri-Fit Miler Long Sleeve Top Dri-FIT UV fabric - To help keep you dry and comfortable while helping to protect against UV rays Flat-seam Constructin - To help minimise chaffing, reducing irritation. Longer back hem - To help keep the shirt in place. Reflective Details - For keeping you safe in low light conditions. Reflective Loop - At upper back to keep media-player cords out of the way