Why 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; Thumbholes to keep hands warm; comes with "Big Margin Tennis" Logo on front.