NIKE CHALLENGER TEE (MENS) Three-layer Therma-Tech Sphere fabric has raised nodes that trap warm air against your body and allows for airflow Dri-FIT fabric helps keep you dry and comfortable DWR (durable, water-repellent) finish helps keep you dry in light rain Interior media pocket with embroidered eyelet keeps cords out of the way Close fit and stretch fabric give you a streamlined shape and full range of motion