Stay warm in any condition with the Diadora Warm Up Long Sleeve Winter Protection! Built with Coolcore fabric, this long sleeve running t-shirt improves thermoregulation and breathability to keep you comfortable. The chest features a nylon insert with light Primaloft padding for added insulation. Enjoy extra protection from the internal fleece lining while the high collar and thumbholes keep you shielded from the wind. Store your keys and phone in the side pocket with a zip closure. Reflective elements add visibility in low-light situations, so you can enjoy running at night!