4.3 oz., preshrunk 100% combed ringspun cotton; 30 singles; Heather Grey is 90% cotton, 10% polyester; Heather colors and Neon colors are 65% poly/35% cotton; Seamed collar; Shoulder-to shoulder tape; features a TearAway label; Tubular construction; semi-fitted; Double-needle sleeve and bottom hem; Oeko-Tex® Standard 100 Certified;