Our Delta 1913 Barcode Sigma Red Theta Premium T-shirt is the perfect tshirt for barcode fans. It's a great gift idea for a birthday or Christmas. People who love sigma, red or theta will love this premium tee shirt. Great present for Men, Women and Kids Crafted from a unique 40 singles tri-blend fabric, offering a lightweight, ultra-soft feel Classic crew neck design with side-seam construction ensures both comfort and a flattering silhouette Lighter colors are semi-sheer