Personalized Groovy Retro Sigma Babe T-Shirt. Our Sigma design stands out as a thoughtful present that your Sigma friends will adore. With its eye-catching aesthetics and meaningful representation, it’s an ideal choice for any occasion. Show your appreciation for your friends and family by gifting them something that resonates with their interests. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.