The Nike Wool Half Zip Long Sleeve Running Top provides a lightweight layer of warmth & comfort. The top is manufactured with Dri-FIT, which helps to draw sweat away from the body so that it evaporates into the air from the fabric surface, providing maximum comfort whilst you exercise. The mock neck provides extra weather protection, keeping your neck sheltered in colder conditions, whilst the half-zip can provide essential ventilation when needed. Flat seams minimise the risk of irritation & create a streamlined fit without bulk.