4.5 oz., 100% certified organic combed ringspun cotton; Seamed collarette; Double-needle stitching on sleeves and bottom hem; Shoulder-to-shoulder tape; TearAway™ label; Certified under Oeko-Tex® Standard 100; Heather Grey is 90% certified organic cotton, 10% polyester fashion fit; For more information visit www.TrackMyT.com