For the long winter months or when the first signs of spring occur and the layers get less, long sleeve tops are essential. Not only do they do the obvious and offer a little more coverage, the fabric can be slightly thicker or contain thermal properties to give you the extra warmth that is sometimes necessary. Some styles also have thumbholes to help keep your hands warm. Whether it is a crew neck or a half zip with a high collar, a long sleeve top will also have all the factors you would expect from any running top. One of the most important is moisture wicking fabrics to move sweat away from the body quickly to keep you dry which is vital in all weather conditions and temperatures. The seams are cut and stitched to help with freedom of movement and reduce chafing and strategically placed mesh panels will provide ventilation. You will always find some form of reflective detailing on the front and back as a safety measure.