Gildan - Ultra Cotton Sleeveless T-Shirt. 27006-ounce, 100% cotton, 50/50 cotton/poly (Safety Green), 90/10 cotton/poly (Sport Grey), Seamless double-needle 7/8" neck, Double-needle armholes and hem, Due to the nature of 50/50 cotton/poly neon fabrics, special care must be taken throughout the printing process.