Sport-Tek Exchange 1.5 Long Sleeve 1/2-Zip ST711Why did we name this stretchable 1/2-zip the 1.5? Because it's light enough to wear as a tee, but warm enough to be a light layer., 5.6-ounce, 88/12 poly/spandex, Removable tag for comfort and relabeling, Reverse coil zipper, Coverstitch seams throughout, Open cuffs and hem