Designed with input from trail runners around the world, Nike Trail socks provide long-lasting grip underfoot. With a comfortable, snug fit, you don't have to worry about taking on wet, rocky trails. For this season's Nike Trail collection, feedback from athletes who run trail was used to create running gear specifically designed for running in the great outdoors. The wool blend fabric keeps your feet comfortable all year round. NikeGrip fibers keep your foot in place. Mesh between the grip zones provides optimal breathability while wicking moisture. The heel tab resists abrasion while keeping dust out of the shoe. Heel fabric provides optimal foot support. Thicker yarns wrap around the arch for added support.